1. A cylinder of copper (8.92 g/cm 3 ) is found to have a mass of 1681 grams. a. The cylinder is 15.0 cm tall. Calculate the radius. (2.0cm) b. A rectangular piece of copper has a mass of 0.330 kg. The dimensions are 1.00 cm and a width of 4.000 cm by 9.000 cm. Calculate the experimental density.(9.17g/cm 3 ) c. Calculate the percent error. (2.8%) 2. 1220 J of heat is added to 50.0 grams of water at 25.0 o C. a. Calculate the change in temperature of the water. (5.8 o C) b. Calculate the final temperature of the water. (30.8 o C)
60
Embed
1.A cylinder of copper (8.92 g/cm 3 ) is found to have a mass of 1681 grams. a.The cylinder is 15.0 cm tall. Calculate the radius. (2.0cm) b.A rectangular.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1. A cylinder of copper (8.92 g/cm3) is found to have a mass of 1681 grams.a. The cylinder is 15.0 cm tall. Calculate the radius. (2.0cm)b. A rectangular piece of copper has a mass of 0.330 kg. The
dimensions are 1.00 cm and a width of 4.000 cm by 9.000 cm. Calculate the experimental density.(9.17g/cm3)
c. Calculate the percent error. (2.8%)
2. 1220 J of heat is added to 50.0 grams of water at 25.0oC. a. Calculate the change in temperature of the water. (5.8oC)b. Calculate the final temperature of the water. (30.8oC)c. Convert the heat to kilojoules. (1.22 kJ)d. Convert the heat to calories. (292 cal)
1. What type of element is:
Ba Br Th S
Rb Ti Kr Ce
2. What year did Mendeleev publish his periodic table?
3. How is the modern table different than Mendeleev’s?
4. Why do metals conduct and non-metals do not?
Periodic Table
Law of octaves – properties repeat every 7 elements
John Newlands (1863)
Periodic TableJohn Newlands (1863)
Periodic TableJohn Newlands (1863)
Periodic Table
• Dmitri Mendeleev – 1869
• Father of the Periodic Table
Mendeleev (1869)
Periodic TableMendeleev (1869)
Periodic Table
• Major Success - Left spaces where there should be an element
Mendeleev (1869)
Al Si P
Ga As
In Sn Sb
Periodic Table
Eka-Silicon - “below silicon”
Eka-Silicon(1871)
~72 g/mol
Density ~5.5 g/mL
Dark Gray Metal
EsO2 (4.7 g/mL)
Mendeleev (1869)
Periodic Table
Eka-Silicon(1871) Germanium(1886)
~72 g/mol 72.6 g/mol
Density ~5.5 g/mL5.36 g/mL
Dark Gray Metal Dark Gray Metal
EsO2 (4.7 g/mL) GeO2 (4.7 g/mL)
(Scandium and Gallium predicted also)
Mendeleev (1869)
Periodic Table
Periodic Table
Modern Table -Different than Mendeleev’s
– Problem with Mendeleev’s table - Arranged his table by atomic mass
– Modern table arranged by atomic number (Moseley)
Mendeleev (1869)
Periodic Table
Periodic Table
Propertiesa. Solids b. Ductilec. Malleabled. Conduct Electricity and heate. Large - Tend to lose electrons
Metals
Periodic Table
Periodic Table
Periodic Table
Periodic Table
Propertiesa. Gases or solids
b. Brittle
c. Don’t conduct Electricity & heat well
d. Essential for Life
CHONSP
e. Small - Tend to gain electrons
Non-Metals
Periodic Table
Periodic Table
Periodic Table
Properties
a. Have properties of both metals and non-metals
b. Semi-Conductors - Conduct electricity only if a larger current is applied
c. Used in computer chips, cell phones, etc…
d. B, Si, Ge, As, Sb, Te
Metalloids
Periodic Table
Periodic Table
Period – AcrossGroup – Down
Group Names
Periodic TableGroup Names
Periodic Table
• Standard Temperature = 25oC
• Solids – Most Elements
Liquids – Hg and Br2
Gases – H2, N2, O2, F2, Cl2
& Noble Gases
States
IA IIA IIIA IVA VA VIA VIIA
HydrideH-
LithiumLi+
BerylliumBe2+
CarbideC4-
NitrideN3-
OxideO2-
FluorideF-
SodiumNa+
MagnesiumMg2+
AluminumAl3+
PhosphideP3-
SulfideS2-
ChlorideCl-
PotassiumK+
CalciumCa2+
SelenideSe2-
BromideBr-
RubidiumRb+
StrontiumSr2+
TellurideTe2-
IodideI-
CesiumCs+
BariumBa2+
Periodic Table
Cl SO42- OH- PO4
3-
Cu2+
Na
Fe3+
Ba
Periodic Table
H He
Al
Periodic Table
I. Binary CompoundsA. Used for Gr 1 and Gr 2 metals (and
Aluminum)B. Metal has only one standard chargeC. Rules
• Write Metal First• Non-metal becomes “ide”
No Roman # Ionics
Periodic Table
D. Examples
NaCl
BaO
Al2O3
magnesium bromide
aluminum sulfide
potassium oxide
No Roman # Ionics
Periodic Table
II. Compounds with Polyatomics
A. Polyatomic Ion - An Ion with more than one atom (Consider the overall charge)
B. ExamplesHydroxide Sulfate
Nitrate Acetate
No Roman # Ionics
Periodic Table
C. Examplessodium hydroxide
sodium carbonate
aluminum sulfate
NaNO3
Ca(OH)2
(NH4)3PO4
No Roman # Ionics
D. Mixed Examples
magnesium sulfide
magnesium sulfite
magnesium sulfate
lithium phosphide
lithium phosphate
Ba(ClO3)2
BaCl2
Periodic Table
1. An example
Fe(II)and oxygen
Fe(III) and oxygen
How do we distinguish?
2. Metals which have multiple oxidation states
Transition and post-transition metals
Roman # Ionics
Periodic Table
3. The Roman Numeral tells you the charge, NOT how many atoms you have.