Module 18 practice Physical Science

Atoms gain lose, gain, or ______electrons to get a stable outer energy level.

• share
• split
• create
• destroy

A ____________is the force that holds atoms together in a compound.

• Chemical Formula
• Chemical Reaction
• Chemical Bond
• Synthesis Reaction

When does an atom become an ion?

• When it gains or loses electrons and takes on a charge.

• When it is stable because it has a full set of valence electrons.

• When it forms a compound with another atom.

If an atom ​ (a)   electrons, it will become negative.

If an atom ​ (b)   electrons, it will become positive.

• gains
• loses
• destroys
• creates

How many electrons do most elements want to have in their outer shell to be stable?

What combination of elements will form a covalent compound?

• Metal and metal.

• Metal and nonmetal.

• Nonmetal and nonmetal.

What charge does magnesium take on?

• +1

• +2

• +3

• magnesium iodide

• magnesium diiodide

• monomagnesium diiodide

Ionic bonds are between...

• nonmetals and nonmetals
• carbon and oxygen
• metals and nonmentals
• hydrogen and chlorine