CHEM 1100 Review

Periodic Table

100

What is the typical charge of an halogen anions?

-1

200

What do we can group 1A in the periodic table?

Alkali metals

300

What do we call these elements: B, Si, Ge, As, Sb, Te, Po

Metalloids

400

True or False: 12.01 is the mass number of carbon

False, 12.01 is the average atomic mass

500

What group is sulfur in? (Name)

Chalcogens

Structure of an Atom

100

Write two symbols for neutral chlorine: one with a mass number of 38 and one with a mass number of 35.

Check: The mass number is the superscript on the left and the atomic number is the subscript on the right.

200

Why does the mass number not represent the number of electrons in an atom?

Electrons are essentially massless.

300

How many protons, neutrons, and electrons are in a neutral plutonium atom with a mass number of 235?

94 protons, 141 neutrons, 94 electrons

400

A gallium cation with a mass number of 71 and a charge of 3+ has how many protons, neutrons, and electrons?

31 protons, 40 neutrons, and 28 electrons

500

Name a scientist associated with the discovery of each of the following:

Electrons, Neutrons, Protons

E: J.J Thompson

N: James Chadwick

P: Ernest Rutherford

Naming

100

Name the following: SF₆

sulfur hexafluoride

200

What is the name for this formula: (NH₄)₂CO₃

ammonium carbonate

300

Name the following:  CuCO₃

copper (II) carbonate

400

Name the following: HNO₃

nitric acid

500

Name the following: Fe₂(SO₄)₃

iron (III) sulfate

Miscellaneous

100

1.00 kg of oxygen is equal to how many moles?

62.5 moles

200

How many mg are in a kg?

10⁶ or one million

300

Name two chemical changes/processes.

Combustion (burning), rusting, etc.

400

What is the SI unit for density?

kg/m³

500

Copper has a density of 8.69 g/cm³. What is the volume of a copper sample with mass 20. g reported to the correct number of significant figures?

2.3 cm³