Chapter - 1

THE VISION ACADEMYRZ – 36 A/1, RAJ NAGAR PART – I, DADA CHHATRI WALA MARG PALAM COLONY NEW DELHI – 110045CHEMISTRY CHAPTER - 1

ChemistryIt is the branch of science which deals with the composition, structure and properties of matter. Antoine Laurent Lavoisier is called the father of chemistry.Branches of Chemistry

In addition to these biochemistry, war chemistry, nuclear chemistry forensic chemistry, earth chemistry etc., are other branches of chemistry.MatterAnything which occupies some space and have some mass is called matter. It 15 made up of small particles which have space between them. The matter particles attract each other and are in a state of continuous motion.

Elements

It is the simplest form of pure substance, which can neither be decomposed into nor built from simpler substances by ordinary physical and chemical methods. It contains only one kind of atoms. The number of elements known till date is 118.[Hydrogen IS the most abundant element in the universe. Oxygen (46.6%), a non-metal, is the most abundant element in the earth crust. AI is the most abundant metal in the earth crust. An element can be a metal, a non-metal or a metalloid.]SymbolsA symbol is an abbreviation or shortened form for the full name of an element. The presentsystem of symbols was introduced by Berzelius.Symbol and Latin Names for Some Elements

CompoundsIt is also the form of matter which can be formed by combining two or more elements in a definite ratio by mass. It can be decomposed into its constituent elements by suitable chemical methods, e.g., water (H2O) is made of hydrogen and oxygen in the ratio 1 : 8 by mass. Compounds can be of two types :(i) Inorganic compounds Previously, it was believed that these compounds are derived fromnon-living sources, like rocks and minerals. But these are infact the compounds of all theelements except hydrides of carbon (hydrocarbons) and their derivatives.(ii) Organic compounds According to earlier scientists, these compounds are derived from living sources like plants and animals, or these remain buried under the earth (e.g., petroleum). According to modern concept, these are the hydrides of carbon and their derivatives.MixturesThese are made up of two or more pure substances. They can possess variable composition and can be separated into their components by some physical methods.Mixtures may be homogeneous (when composition is uniform throughout) or heterogeneous (when composition is not uniform throughout). Common methods for the separation of mixtures are(a) Filtration Filtration is the process of separating solids that are suspended in liquids by pouring the mixture into a filter funnel. As the liquid passes through the filter, the solid particles are held on the filter. (b) Distillation Distillation is the process of heating a liquid to form vapours and then cooling the vapours to get back the liquid. This is a method by which a mixture containing volatile substances can be separated into Its components.(c) Sublimation This is the process of conversion of a solid directly into vapours on heating. Substances showing this property are called sublimate, e.g., iodine, naphthalene, camphor. This method is used to separate a sublimate from non-sublimate substances.(d) Crystallisation It is a process of separating solids having different solubilities in a particular solvent.(e) Magnetic separation Tills process is based upon tbe fact that a magnet attracts magnetic components of a mixture of magnetic and non-magnetic substances. The non-magnetic substance remains unaffected. Thus. it can be used to separate magnetic components from nonmagnetic components.(f) Atmolysis Tills method is based upon rates of diffusion of gases and used for their separation from a gaseous mixture.Atoms and Molecules

Atom is the smallest particle of an element which can take part in a chemical reaction. It mayor may not be capable of independent existence.Molecule is the simplest particle of matter that has independent existence. It may be homoatomic e.g., H2, CI2, N2 (diatomic), O3 (triatomic) or heteroatomic, e.g., HCI, NH3, CH3 etc.Physical Quantities and Their MeasurementsUnitsTo express the measurement of any physical quantity two things are considered:(i) Its unit,(ii) The numerical value. Magnitude of a physical quantity = numerical value * unitUnits are of two types:(i) Basic units(ii) Derived units (i) The basic or fundamental units are those of length (m), ass (kg), time (s), electric current(A), thermodynamic temperature (K), amount of substance (mol) and luminous intensity (cd).(ii) Derived units are basically derived from the fundamental units, e.g., unit of density isderived from units of mass and volume.The systems used for describing measurements of various physical quantities are(a) CGS system It is based on centimetre, gram and second as the units of length, mass andtime respectively.(b) FPS system A British system which used foot(ft). pound (lb) and second (s) as thefundamental units of length, mass and time.(c) MRS system Uses metre (m), kilogram (kg) and second (s) respectively for length, mass and time; ampere (A) was added later on for electric current.(d) SI system (1960)International system of units and contains following seven basic and two supplementary units:Base Physical Quantities and their Corresponding Basic Units

SUpplementary units It includes plane angle in radian and solid angle in steradian.PrefixesThe SI units of some physical quantities are either too small or too large. To change the orderof magnitude. these are expressed by using prefixes before the name of base units. The variousprefixes are listed as

Dimensional AnalysisOften while calculating, there is a need to convert units from one system to other. The method used to accomplish this is called factor label method or unit factor method or dimensional analysis. In this, Information sought = Information given * Conversion FactorImportant Conversion Factor

Scientific NotationIn such notation, all measurements (however large or small) are expressed as a number between 1.000 and 9.999 multiplied or divided by 10. In general as N * 10Here, N is called digit term (1.000-9.999) and n is known as exponent. e.g., 138.42 cm can be written as 1.3842 * 102 and 0.0002 can be written as 2.0 * 10-4.precision and AccuracyPrecision refers the closeness of the set of values obtained from identical measurements of a quantity. Precision is simply a measure ofreproducibility of an experiment.Precision = individual value – arithmetic mean valueAccuracy is a measure of the difference between the experimental value or the mean value of a set of measurements and the true value.Accuracy = mean value – true valueIn physical measurements, accurate results are generally precise but precise results need not be accurate. In other words good precision does not assure good accuracy.Significant FiguresSignificant figures are the meaningful digits in a measured or calculated quantity. It includes all those digits that are known with certainty plus one more which is uncertain or estimated. Greater the number of significant figures in a measurement, smaller the uncertainty. Rules for determining the number of significant figures are:1. An digits are significant except zeros in the beginning of a number.2. Zeros to the right of the decimal point are significant. e.g., 0.132, 0.0132 and 15.0, all have three significant figures.

3. Exact numbers have infinite significant figures.Calculations Involving Significant Figures1. In addition or subtraction, the final result should be reported to the same number of decimal places as that of the term with the least number of decimal places, e.g.,

(Reported sum should have only one decimal point.)2. In multiplication and division, the result is reported to the same number of significant figures as least precise term or the term with least number of significant figures, e.g.,Rounding Off the Numerical ResultsWhen a number is rounded off, the number of significant figures is reduced. the last digit retained is increased by 1 only if the following digit is ≥ 5 and is left as such if the following digit is ≤ 4, e.g.,12.696 can be written as 12.718.35 can be written as 18.413.93 can be written as 13.9Laws of Chemical CombinationsThe combination of elements to form compounds is governed by the following six basic laws:1. Law of conservation of mass (Lavoisier, 1774)This law states that during any physical or chemical change, the total mass of the products is equal to the total mass of reactants. It does not hold good for nuclear reactions.2. Law of definite proportions (Proust, 1799)According to this law, a chemical compound obtained by different sources always contains same percentage of each constituent element.3. Law of multiple proportions (Dalton, 1803)According to this law. if two elements can combine to form more than one compound. The masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers, e.g., in NH3 and N2H4, fixed mass of nitrogen requires hydrogen in the ratio 3 : 2.4. Law of reciprocal proportions (Richter, 1792)According to this law, when two elements (say A and 13) combine separately with the same weight of a third element (say C), the ratio in which they do so is the same or simple multiple of the ratio in which they (A and H) combine with each other. Law of definite proportions, law of multiple proportions and law of reciprocal proportions do not hold good when same compound is obtained by using different isotopes of the sameelement. e.g H2O and D2O5. Gay Lussac’s law of gaseous volumesIt states that under similar conditions of temperature and pressure. whenever gases react together. the volumes of the reacting gases as well as products (if gases) bear a simple whole number ratio.6. Avogadro’s hypothesisIt states that equal volumes of all gases under the same conditions of temperature and pressure contain the same number of molecules.Dalton’s Atomic Theory (1803)This theory was based on laws of chemical combinations. It’s basic postulates are1. All substances are made up of tiny. indivisible particles, called atoms.2. In each element, the atoms are all alike and have the same mass. The atoms of different elements differ in mass.3. Atoms can neither be created nor destroyed during any physical or chemical change.4. Compounds or molecules result from combination of atoms in some simple numerical ratio.Mole ConceptTerm mole was suggested by Ostwald (Latin word mole = heap)A mole is defined as the amount of substance which contains same number of elementaryparticles (atoms, molecules or ions) as the number of atoms present in 12 g of carbon (C-12).1 mol = 6.023 * 1023 atoms = one gram-atom = gram atomic mass1 mol = 6.023 * 1023 molecules = gram molecular massIn gaseous state at STP (T = 273 K, p = 1 atm)Gram molecular mass = 1 mol = 22.4 L = 6.022 * 1023molecules

Standard number 6.023x 1023 is called Avogadro number in honour of Avogadro (he did notgive this number) and is denoted by NA.The volume occupied by one mole molecules of a gaseous substance is called molar volume orgram molecular volume.Number of moles = amount of substance (in gram) / molar mass

Number of molecule = number of moles * NANumber of molecules in Ig compound = NA / g-molar massNumber of molecules in 1 cm3 (1 mL) of an ideal gas at STP is called Loschmidt number(2.69x 1019).[One amu or u (unified mass) is equal to exactly the 1 / 12th of the mass of 12C atom, i.e., 1amu or u = 1 / 12 * mass of one carbon (C12) atom1 amu = 1 / NA= 1 Dalton = 1.66x 10-24 gOne mole of electrons weighs 0.55 mg (5.5x 10-4 g).Atomic MassIt is the average relative atomic mass of an atom. It indicates that how many times an atom of that element is heavier as compared with 1 / 12 of the mass of an atom of carbon-12.Average atomic mass = average mass of an atom / 1 / 12 * mass of an atom of C12The word average has been used in the above definition and is very significant because elements occur in nature as mixture of several isotopes. So. atomic mass can be computed asAverage atomic mass= RA(1) * at. mass(1) + RA(2) * at. mass (2) / RA(l) + RA(2)Here, RA is relative abundance of different isotopes.In case of volatile chlorides. the atomic weight is calculated as At. wt. = Eq. wt. x valencyand valency = 2 * vapour density of chloride / eq. wt. of metal + 35.5According to Dulong and Petit’s rule,Atomic weight * specific heat = 6.4Gram Atomic Mass (GAM)Atomic mass of an element expressed in gram is called its gram atomic mass or gram-atom or mole-atom.Molecular MassIt is the mass of a molecule, i.e., number of times a molecule is heavier than 1 / 12 th mass of C-12 atom. Molecular mass of a substance is an additive property and can be calculated by taking algebraic sum of atomic masses of all the atoms of different elements present in one molecule.Molecular Mass = average relative mass of one molecule / 1 / 12 th * mass of C-12 atom[Gram molecular mass or molar mass is molecular mass of a substance expressed in gram.Molecular mass = 2 * V D ]Equivalent MassIt is the mass of an element or a compound which would combine with or displace (by weight)1 part of hydrogen or 8 parts of oxygen or 35.5 parts of chlorineEq. wt. of metal = wt. of metal / wt. of H2 displaced * 1.008= wt. of metal / volume of H2 (in mL) displaced at STP * 11200Eq. wt. of metal = wt. of metal / wt. of oxygen combined * 8= wt. of metal / wt. of chlorine combined * 35.5In general,Wt. of substance A / Wt. of substance B = Eq. wt. of A / Eq. wt. of Bor for a compound (I) being converted into another compound (II) of same metalWt. of compound I / Wt. of compound II = eq. wt. of metal + eq. wt. of anion of compound I / eq. wt. of metal + eq. wt. of anion of compound II

Eq. mass 0f a salt = formula mass / total positive or negative chargeEquivalent mass = atomic mass or Molecular mass / n factorn factor for various compounds can be obtained as(i) n factor for acids i.e., basicity(Number of ionisable H+ per molecule is the basicity of acid.)

(ii) n factor for bases, i.e., acidity.(Number of ionisable OH- per molecule is the acidity of a base.)

(iii) In case of ions, 11 factor is equal to charge of that ion.(iv) In redox titrations, 11 factor is equal to change in oxidation number.

Equivalent mass of organic acid (RCOOH) is calculated by the following formulaEq. wt. of silver salt of acid (RCOOAg) / Eq. wt. of Ag(or 108) = Vt. of silver salt / Wt. ofsilverStoichiometryThe relative proportions in which the reactants react and the products are formed, is called stoichiometry (from the Greek word meaning ‘to measure an element’.)Limiting reagent It is the reactant which is completely consumed during the reaction.Excess reagent It is the reactant which is not completely consumed and remains unreacted during the reaction.[In a irreversible chemical reaction, the extent of product can be computed on the basis of limiting reagent in the chemical reaction]Percent YieldThe actual yield of a product in any reaction is usually less than the theoretical yield because of the occurrence of certain side reactions.Percent yield = actual yield / theoretical yield * 100Empirical and Molecular FormulaeEmpirical formula is the simplest formula of a compound giving simplest whole number ratio of atoms present in one molecule, e.g., CH is empirical formula of benzene (C6H6).Molecular formula is the actual formula of a compound showing the total number of atoms of constituent elements, e.g., C6H6 is molecular formula of benzene.Molecular formula = (Empirical formula)nwhere, n is simple whole number having values 1, 2, 3, … , etc., and can be calculated asn = molecular formula mass / empirical formula mass

List of Periodic Table Elements Sorted by Atomic Number

No. 

AtomicWeight

Name Sym. M.P.(°C)

 B.P. (°C)

Density*(g/cm3)

Earthcrust (%)*

Discovery(Year)

Group* Electronconfiguration

Ionizationenergy

(eV)

1 1.0079 Hydrogen H -259 -253 0.09 0.14 1776 1 1s1 13.5984

2 4.0026 Helium He -272 -269 0.18 1895 18 1s2 24.5874

3 6.941 Lithium Li 180 1347 0.53 1817 1 [He] 2s1 5.3917

4 9.0122 Beryllium Be 1278 2970 1.85 1797 2 [He] 2s2 9.3227

5 10.811 Boron B 2300 2550 2.34 1808 13 [He] 2s2 2p1 8.298

6 12.0107 Carbon C 3500 4827 2.26 0.094 ancient 14 [He] 2s2 2p2 11.2603

7 14.0067 Nitrogen N -210 -196 1.25 1772 15 [He] 2s2 2p3 14.5341

8 15.9994 Oxygen O -218 -183 1.43 46.71 1774 16 [He] 2s2 2p4 13.6181

9 18.9984 Fluorine F -220 -188 1.7 0.029 1886 17 [He] 2s2 2p5 17.4228

10 20.1797 Neon Ne -249 -246 0.9 1898 18 [He] 2s2 2p6 21.5645

11 22.9897 Sodium Na 98 883 0.97 2.75 1807 1 [Ne] 3s1 5.1391

12 24.305 Magnesium Mg 639 1090 1.74 2.08 1755 2 [Ne] 3s2 7.6462

13 26.9815 Aluminum Al 660 2467 2.7 8.07 1825 13 [Ne] 3s2 3p1 5.9858

14 28.0855 Silicon Si 1410 2355 2.33 27.69 1824 14 [Ne] 3s2 3p2 8.1517

15 30.9738 Phosphorus P 44 280 1.82 0.13 1669 15 [Ne] 3s2 3p3 10.4867

16 32.065 Sulfur S 113 445 2.07 0.052 ancient 16 [Ne] 3s2 3p4 10.36

17 35.453 Chlorine Cl -101 -35 3.21 0.045 1774 17 [Ne] 3s2 3p5 12.9676

18 39.948 Argon Ar -189 -186 1.78 1894 18 [Ne] 3s2 3p6 15.7596

19 39.0983 Potassium K 64 774 0.86 2.58 1807 1 [Ar] 4s1 4.3407

20 40.078 Calcium Ca 839 1484 1.55 3.65 1808 2 [Ar] 4s2 6.1132

21 44.9559 Scandium Sc 1539 2832 2.99 1879 3 [Ar] 3d1 4s2 6.5615

22 47.867 Titanium Ti 1660 3287 4.54 0.62 1791 4 [Ar] 3d2 4s2 6.8281

23 50.9415 Vanadium V 1890 3380 6.11 1830 5 [Ar] 3d3 4s2 6.7462

24 51.9961 Chromium Cr 1857 2672 7.19 0.035 1797 6 [Ar] 3d5 4s1 6.7665

25 54.938 Manganese Mn 1245 1962 7.43 0.09 1774 7 [Ar] 3d5 4s2 7.434

26 55.845 Iron Fe 1535 2750 7.87 5.05 ancient 8 [Ar] 3d6 4s2 7.9024

27 58.9332 Cobalt Co 1495 2870 8.9 1735 9 [Ar] 3d7 4s2 7.881

28 58.6934 Nickel Ni 1453 2732 8.9 0.019 1751 10 [Ar] 3d8 4s2 7.6398

29 63.546 Copper Cu 1083 2567 8.96 ancient 11 [Ar] 3d10 4s1 7.7264

30 65.39 Zinc Zn 420 907 7.13 ancient 12 [Ar] 3d10 4s2 9.3942

31 69.723 Gallium Ga 30 2403 5.91 1875 13 [Ar] 3d10 4s2 4p1 5.9993

32 72.64 Germanium Ge 937 2830 5.32 1886 14 [Ar] 3d10 4s2 4p2 7.8994

33 74.9216 Arsenic As 81 613 5.72 ancient 15 [Ar] 3d10 4s2 4p3 9.7886

34 78.96 Selenium Se 217 685 4.79 1817 16 [Ar] 3d10 4s2 4p4 9.7524

35 79.904 Bromine Br -7 59 3.12 1826 17 [Ar] 3d10 4s2 4p5 11.8138

36 83.8 Krypton Kr -157 -153 3.75 1898 18 [Ar] 3d10 4s2 4p6 13.9996

37 85.4678 Rubidium Rb 39 688 1.63 1861 1 [Kr] 5s1 4.1771

38 87.62 Strontium Sr 769 1384 2.54 1790 2 [Kr] 5s2 5.6949

39 88.9059 Yttrium Y 1523 3337 4.47 1794 3 [Kr] 4d1 5s2 6.2173

40 91.224 Zirconium Zr 1852 4377 6.51 0.025 1789 4 [Kr] 4d2 5s2 6.6339

41 92.9064 Niobium Nb 2468 4927 8.57 1801 5 [Kr] 4d4 5s1 6.7589

42 95.94 Molybdenum Mo 2617 4612 10.22 1781 6 [Kr] 4d5 5s1 7.0924

43 * 98 Technetium Tc 2200 4877 11.5 1937 7 [Kr] 4d5 5s2 7.28

44 101.07 Ruthenium Ru 2250 3900 12.37 1844 8 [Kr] 4d7 5s1 7.3605

45 102.9055 Rhodium Rh 1966 3727 12.41 1803 9 [Kr] 4d8 5s1 7.4589

46 106.42 Palladium Pd 1552 2927 12.02 1803 10 [Kr] 4d10 8.3369

47 107.8682 Silver Ag 962 2212 10.5 ancient 11 [Kr] 4d10 5s1 7.5762

48 112.411 Cadmium Cd 321 765 8.65 1817 12 [Kr] 4d10 5s2 8.9938

49 114.818 Indium In 157 2000 7.31 1863 13 [Kr] 4d10 5s2 5p1 5.7864

50 118.71 Tin Sn 232 2270 7.31 ancient 14 [Kr] 4d10 5s2 5p2 7.3439

51 121.76 Antimony Sb 630 1750 6.68 ancient 15 [Kr] 4d10 5s2 5p3 8.6084

52 127.6 Tellurium Te 449 990 6.24 1783 16 [Kr] 4d10 5s2 5p4 9.0096

53 126.9045 Iodine I 114 184 4.93 1811 17 [Kr] 4d10 5s2 5p5 10.4513

54 131.293 Xenon Xe -112 -108 5.9 1898 18 [Kr] 4d10 5s2 5p6 12.1298

55 132.9055 Cesium Cs 29 678 1.87 1860 1 [Xe] 6s1 3.8939

56 137.327 Barium Ba 725 1140 3.59 0.05 1808 2 [Xe] 6s2 5.2117

57 138.9055 Lanthanum La 920 3469 6.15 1839 3 [Xe] 5d1 6s2 5.5769

58 140.116 Cerium Ce 795 3257 6.77 1803 101 [Xe] 4f1 5d1 6s2 5.5387

59 140.9077 Praseodymium Pr 935 3127 6.77 1885 101 [Xe] 4f3 6s2 5.473

60 144.24 Neodymium Nd 1010 3127 7.01 1885 101 [Xe] 4f4 6s2 5.525

61 * 145 Promethium Pm 1100 3000 7.3 1945 101 [Xe] 4f5 6s2 5.582

62 150.36 Samarium Sm 1072 1900 7.52 1879 101 [Xe] 4f6 6s2 5.6437

63 151.964 Europium Eu 822 1597 5.24 1901 101 [Xe] 4f7 6s2 5.6704

64 157.25 Gadolinium Gd 1311 3233 7.9 1880 101 [Xe] 4f7 5d1 6s2 6.1501

65 158.9253 Terbium Tb 1360 3041 8.23 1843 101 [Xe] 4f9 6s2 5.8638

66 162.5 Dysprosium Dy 1412 2562 8.55 1886 101 [Xe] 4f10 6s2 5.9389

67 164.9303 Holmium Ho 1470 2720 8.8 1867 101 [Xe] 4f11 6s2 6.0215

68 167.259 Erbium Er 1522 2510 9.07 1842 101 [Xe] 4f12 6s2 6.1077

69 168.9342 Thulium Tm 1545 1727 9.32 1879 101 [Xe] 4f13 6s2 6.1843

70 173.04 Ytterbium Yb 824 1466 6.9 1878 101 [Xe] 4f14 6s2 6.2542

71 174.967 Lutetium Lu 1656 3315 9.84 1907 101 [Xe] 4f14 5d1 6s2 5.4259

72 178.49 Hafnium Hf 2150 5400 13.31 1923 4 [Xe] 4f14 5d2 6s2 6.8251

73 180.9479 Tantalum Ta 2996 5425 16.65 1802 5 [Xe] 4f14 5d3 6s2 7.5496

74 183.84 Tungsten W 3410 5660 19.35 1783 6 [Xe] 4f14 5d4 6s2 7.864

75 186.207 Rhenium Re 3180 5627 21.04 1925 7 [Xe] 4f14 5d5 6s2 7.8335

76 190.23 Osmium Os 3045 5027 22.6 1803 8 [Xe] 4f14 5d6 6s2 8.4382

77 192.217 Iridium Ir 2410 4527 22.4 1803 9 [Xe] 4f14 5d7 6s2 8.967

78 195.078 Platinum Pt 1772 3827 21.45 1735 10 [Xe] 4f14 5d9 6s1 8.9587

79 196.9665 Gold Au 1064 2807 19.32 ancient 11 [Xe] 4f14 5d10 6s1 9.2255

80 200.59 Mercury Hg -39 357 13.55 ancient 12 [Xe] 4f14 5d10 6s2 10.4375

81 204.3833 Thallium Tl 303 1457 11.85 1861 13 [Xe] 4f14 5d10 6s2 6p1

6.1082

82 207.2 Lead Pb 327 1740 11.35 ancient 14 [Xe] 4f14 5d10 6s2 6p2

7.4167

83 208.9804 Bismuth Bi 271 1560 9.75 ancient 15 [Xe] 4f14 5d10 6s2 6p3

7.2856

84 * 209 Polonium Po 254 962 9.3 1898 16 [Xe] 4f14 5d10 6s2 6p4

8.417

85 * 210 Astatine At 302 337 1940 17 [Xe] 4f14 5d10 6s2 6p5

9.3

86 * 222 Radon Rn -71 -62 9.73 1900 18 [Xe] 4f14 5d10 6s2 6p6

10.7485

87 * 223 Francium Fr 27 677 1939 1 [Rn] 7s1 4.0727

88 * 226 Radium Ra 700 1737 5.5 1898 2 [Rn] 7s2 5.2784

89 * 227 Actinium Ac 1050 3200 10.07 1899 3 [Rn] 6d1 7s2 5.17

90 232.0381 Thorium Th 1750 4790 11.72 1829 102 [Rn] 6d2 7s2 6.3067

91 231.0359 Protactinium Pa 1568 15.4 1913 102 [Rn] 5f2 6d1 7s2 5.89

92 238.0289 Uranium U 1132 3818 18.95 1789 102 [Rn] 5f3 6d1 7s2 6.1941

93 * 237 Neptunium Np 640 3902 20.2 1940 102 [Rn] 5f4 6d1 7s2 6.2657

94 * 244 Plutonium Pu 640 3235 19.84 1940 102 [Rn] 5f6 7s2 6.0262

95 * 243 Americium Am 994 2607 13.67 1944 102 [Rn] 5f7 7s2 5.9738

96 * 247 Curium Cm 1340 13.5 1944 102 5.9915

97 * 247 Berkelium Bk 986 14.78 1949 102 6.1979

98 * 251 Californium Cf 900 15.1 1950 102 6.2817

99 * 252 Einsteinium Es 860 1952 102 6.42

100 * 257 Fermium Fm 1527 1952 102 6.5

101 * 258 Mendelevium Md 1955 102 6.58

102 * 259 Nobelium No 827 1958 102 6.65

103 * 262 Lawrencium Lr 1627 1961 102 4.9

104 * 261 Rutherfordium Rf 1964 4

105 * 262 Dubnium Db 1967 5

106 * 266 Seaborgium Sg 1974 6

107 * 264 Bohrium Bh 1981 7

108 * 277 Hassium Hs 1984 8

109 * 268 Meitnerium Mt 1982 9