unit 3 review

If an atom becomes an ion with a 2+ charge, what does that mean?

• It has lost 2 electrons
• It has gained 2 electrons
• The atom is in period 2
• The atom has an atomic # of 2

How do the following two elements bond together?
Cr³⁺  O^2-         

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

How do the following two elements bond together?
K¹⁺  S^2- 

• KS
• K₈S
• K₆S₃
• K₂S

What is the formula for magnesium chloride?

• MgCl
• Mg₂Cl
• MgCl₂
• Mg(ClO₃)₂

Which of these combinations is an ionic compound made of?

• Metal and Metal
• Nonmetal and Nonmetal
• Metal and Nonmetal
• Cation and Cation

What is the element/ion symbol for Iron(III)?

• Fe
• Fe³⁺
• Fe^3-
• Fe(III)

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

What is the compound made between Chlorate and Magnesium

• Cl₂Mg
• (ClO₃)₂Mg
• MgCl₂
• Mg(ClO₃)₂

How do the following two elements bond together?
Pb⁴⁺  O^2-       

• PbO
• Pb₄O₂
• PbO₂
• Pb₂O₄

The name of FeCl₂ is

• iron chloride
• iron (II) chloride
• iron (I) chloride
• iron dichloride