Compounds

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

What is the chemical formula for magnesium hydroxide?

Back

Mg(OH)₂

Front

What happens to magnesium when it forms an ion?

Back

Magnesium loses two electrons to form a Mg²⁺ ion.

Front

What is the ratio of ions in the compound formed by aluminum and sulfur?

Back

The correct formula is Al₂S₃.

Front

What shape does a trigonal pyramidal molecule have?

Back

A trigonal pyramidal molecule has a central atom with three bonded atoms and one lone pair, creating a pyramid shape.

Front

What happens to iodine when it forms an ion?

Back

Iodine gains one electron to form an I⁻ ion.

Front

What is the significance of the subscript in a chemical formula?

Back

The subscript indicates the number of atoms of each element in a compound.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons between metals and nonmetals, while covalent compounds are formed by the sharing of electrons between nonmetals.

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.

Front

What is a polyatomic ion?

Back

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