Chemistry Unit 2

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Chemistry Unit 2Practice Test

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Indicator 1: Calculate PNE

1. Which atom contains exactly 30 protons?A. Ca – 30B. Co – 59C. Zn – 65D. Br – 80

HINT: What is Element 30?

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2. What is the total number of subatomic particles in a neutral atom of Beryllium?

A. 4B.9C.13D.17

Indicator 1: Calculate PNE

Hint: How many protons, neutrons and electrons does it have? Add them!

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3. Compared to the charge and mass of an electrons, a proton has

A. The same charge and a smaller mass

B. The same charge and a greater mass

C.The opposite charge and a smaller mass

D.The opposite charge and a greater mass

Indicator 1: Calculate PNE

Make a Table to compare:Charge Mass

ProtonsElectronsThen treat the answer choices like True/False.

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4. Using the Periodic Table, how many neutrons would the most common isotope of Cobalt have?

A. 27B. 31C.32D.59

Indicator 1: Calculate PNE

Hint: Look up CobaltElement #27 – Mass 5959 – 27 = ???

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5. How many protons are in Si-28?

A.42B.28C.14D.2

Indicator 1: Calculate PNE

Hint: Look up SiElement #14So there are how many protons???

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6. What is the atomic mass of an element with 17 electrons, 19 protons and 13 neutrons?

A.32B.30C.19D.13

Indicator 1: Calculate PNE

Hint: Atomic mass is protons + neutrons19 + 13 = ???

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7. Given Element A has 7 protons, 7 neutrons and 7 electrons and Element B has 6 protons, 7 neutrons and 8 electrons which statement is true?

A. Elements A and B have the same mass.B. Element A and B have the same number of

subatomic particles.C. Elements A and B are isotopes of the same

element.D. Elements A and B have the same number

of electrons in the outer energy level

Indicator 2: Ion / Isotope

Hint: Make a chart to compare A and B

PN E

Then – treat the answer choices like true/false.

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8. What is the isotope notation 2 for an element with 11 protons, 13 neutrons and 11 electrons?

A. Al-13B. Na-11C.Al-24D.Na-24

Indicator 2: Ion/Isotope

Hint: Isotope notation 2 is Symbol – MassSymbol is the number of protons (11) = ??? [Sodium]Mass is protons + neutrons: 11 + 13 =???

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Indicator 2: Ions / Isotopes

9. What is the charge of an atom that has lost an electron?

A.1+B.1-C.2+D.2-

Hint: Loosing an electron creates a ??? Charge, gaining electrons create a ??? Charge – What charge do electrons have????

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10. What is defined as having a different number of neutrons and therefore a different atomic mass?

A.An ionB.An isotopeC.StableD.Element

Indicator 2: Ions / Isotopes

Hint : different neutrons = ???

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Indicator 3: Diagrams

11. How many electrons does Calcium have in its outer energy level?

A.2B.4C.8D.10

Hint: Valence electrons = electrons in outer energy level.

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12. An ion with 6 protons, 7 neutrons and a charge of 2+ would have how many electrons?A. 4B. 6C. 7D. 8

Indicator 3: Diagrams

Hint: 6 – 2+ = ???

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Indicator 3: Diagrams

13. In a filling the electron shells, where do electrons ‘go’ after you fill level 3p?

A.3dB.4sC.2pD.2d

Hint: Look at the Electron Configuration Chart!!!

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14. What element is in Group 13, Period 2?

A.BoronB.AluminumC.SodiumD.Magnesium

Indicator 4: Periodic Table

Hint: Group is the column, period is the row – read the periodic table!

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15. Which element is a metal?

A.PotassiumB.IronC.SiliconD.Bromine

Indicator 4: Periodic Table

Hint: Look at the periodic table color coding – treat the answers like true/false.

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16. Carbon and Sulfur are similar in that they both

A.Have the same ionization energy

B.Are transition metalsC.Are non-metalsD.Are gases

Indicator 4: Periodic Table

Hint: find Carbon and Sulfur – identify they are both Non-Metals – treat the answers like true/false.