Unit 4 Review Chemistry

What charge does a calcium (Ca) ion have?

• +1
• +2
• +3
• +4

Name the following ionic compound: BeCl₂

• beryllium chlorine

• beryllium chlorate

• beryllium chloride

• beryllium dichloride

Name the following ionic compound: LiNO₃

• lithium nitrate
• lithium III nitrate
• lithium nitride
• lithium oxide

Write the formula name for the following compound Cu₂SO₄ given that copper has an oxidation state of +1.

• copper (IV) sulfate

• copper (III) sulfate

• copper (II) sulfate

• copper (I) sulfate

A polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms.

• oxyanion
• polyatomic ion
• alloy
• metallic bond

Which of following are properties of ionic bonds? (YOU MAY SELECT MORE THAN ONE ANSWER)

• High melting point

• Low melting point

• Solid at room temperature

• Gas at room temperature

• Conducts electricity when dissolved in water

Tags

NGSS.HS-PS1-3

What charge will bromine form when becoming an ion?

• 1+

• 1-

• 7+

• 7-

• 0

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the ionic compound, Ca₃N₂, what does the 2 indicate?

• Nitrogen has a -2 charge

• Nitrogen has 2 valence electrons

• Calcium has a -2 charge

• There is a 3:2 ratio - the 2 indicates the number of nitrogen ions

• There is a 3:2 ratio - the 2 indicates the number of calcium ions

The weaker a bond (lower bond energy) the ____ likely a compound is to conduct electricity.

• less

• more

What is the basis of hydrogen bond?

• Attraction forces between hydrogen atom bonded with another hydrogen atom

• Attraction forces between hydrogen atom bonded with a high electronegativity atom (F, O, N)

• Attraction forces between hydrogen atom bonded with a high electronegativity atom (F, O, N) with atom (F, O, N) of another molecule

• Attraction forces between hydrogen atom with another hydrogen atom of another molecule