Chemistry Unit Test Review

Atomic Structure

100

True or False: Protons are positively charged.

True (protons have a charge of +1)

200

These subatomic particles are found in the nucleus

Protons and Neutrons

300

An element's atomic number tells you how many ____________ it has

protons

400

This is the formula to solve for how many neutrons an atom has.

Neutrons = Atomic mass - protons

500

Carbon-14 has an atomic number of 6. How many neutrons does it have?

8 neutrons (14 – 6)

Diagrams

100

True or False: The first ring of a Bohr-Rutherford diagram only holds 2 electrons

True (next rows are 8, 8, 18)

200

Which diagrams only display valence electrons.

Lewis-Dot Diagrams

300

How can you easily determine the number of valence electrons an element has from the periodic table

Group number (ex: group 13, 3 valence e^-)

400

How many electrons would be shown on the Lewis Structure of Chlorine

Seven

500

How many electrons would go in each ring (from inner to outer) for a Bohr Rutherford diagram of Sulfur.

2, 8, 6

Naming Compounds

100

Ionic compounds are made up of what?

Metal and non-metal

200

True or False: You only use prefixes (mono, di, tri, etc.) when naming molecular compounds.

True 

300

What is the name of this compound: CaCl₂

calcium chloride

400

What is the formula for dinitrogen tetroxide?

N₂O₄

500

The common name for CH₄

methane

Ions

100

True or False: Metals often form anions

False (Metals form cations, non-metals form anions)

200

This group already has a full outer shell

Group 18 (noble gases)

300

What do we call positively charged ions

Cations

400

Will calcium lose or gain electrons when forming an ion?

Lose (only has two valence e^-)

500

Phosphorus is in group 5. What ion charge will it form?

-3 (gains 3 electrons to fill outer shell).