Atoms, Ions and Formulas

A calcium ion has a charge of

• 1+

• 2+

• 1-

• 2-

Sodium and Oxygen form an ionic compound. Which is the correct formula?

• NaO

• Na₂O

• NaO₂

• Na₂O₂

If an ion is formed by the loss of a(n) electron(s) the ion has a ___ charge.

• Positive

• Negative

• Neutral

If an ion is formed by the gain of a(n) electron(s) the ion has a ___ charge.

• Positive

• Negative

• Neutral

A fluorine ion has a charge of

• 1+

• 2+

• 1-

• 2-

Calcium and Fluorine form an ionic compound. Which is the correct formula?

• CaF

• Ca₂F

• CaF₂

• Ca₂F₂

What is the ionic charge of strontium?

• 1+

• 2+

• 1-

• 2-

In an ionic formula with which element (below) would need to be named with a roman numeral?

• calcium

• iron

• zinc

• potassium

In an ionic formula with which element (below) would need to be named with a roman numeral?

• rubidium

• silver

• nickel

• magnesium

Ionic compounds typically contain

• two different metallic elements

• a metallic element and a nonmetallic element

• two different nonmetallic elements

• metalloids