Front

What is a chemical bond?

Back

A chemical bond is a lasting attraction between atoms, ions, or molecules that enables the formation of chemical compounds.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, resulting in the formation of charged ions. Covalent bonds involve the sharing of electrons between atoms.

Front

What is the charge of Group 1 elements when they form ions?

Back

Group 1 elements lose one electron to form ions with a 1+ charge.

Front

What is the correct formula for the compound formed by Co⁺² and NO_2^-?

Back

Co(NO₂)₂.

Front

What is the first item written in the formula of an ionic compound?

Back

The positive ion is written first.

Front

What is the chemical name for Fe₃N₂?

Back

Iron (II) nitride.

Front

Which of the following is NOT formed by a covalent bond: K₂S, H₂O, I₂, CO₂?

Back

K₂S is NOT formed by a covalent bond.

Front

What is a polyatomic ion?

Back

A polyatomic ion is a charged ion composed of two or more atoms covalently bonded together.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a compound.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.