Chemical Bonding 22

Nitrogen will form which of the following ions?

• N
• N^-3
• N^-5
• N⁺⁵

In the chemical formula for an ionic compound, which item is written first?

• positive ion
• negative ion
• subscript
• the female

Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?

• There are 2 bromide ions for every magnesium ion
• Bromide has a 2- charge
• Bromide has a 2+ charge
• There are 2 magnesium ions to every bromide ion

Which of the following is true for ionic bonding & ionic compounds? There are multiple answers.

• They must be made of ions with like charges.

• The negative ion must be written first.

• Compounds must have an overall charge of zero.

• They are made of metals and nonmetals.

• The positive ion must be written first.

Metals tend to 

• gain electrons
• lose electrons

What is the charge of ion "X" in the formula XF₃?

• +3

• -3

• +1

• -1

What is the charge of ion "Y" in CaY?

• +1

• -1

• +2

• -2

Which of the following pairs of elements will NOT form an ionic compound?

• sodium and fluorine

• phosphorous and aluminum

• potassium and magnesium

• strontium and oxygen

A covalent bond forms when atoms ___________ electrons.

• gain

• share

• increase

• transfer

Which of the following is ionic?

• NO₂
• MgO
• CO
• CH₄