Formulas for Binary Compounds

Front

What is a negatively-charged ion called?

Back

An anion.

Front

Which element forms an ion with a 2- charge?

Back

Selenium (Se).

Front

How many electrons does a phosphorus atom need to gain to achieve a full octet?

Back

3 electrons.

Front

How many valence electrons does a bromine atom have?

Back

7 valence electrons.

Front

What is the chemical formula for the ionic compound of potassium and oxygen?

Back

K₂O.

Front

What is a cation?

Back

A positively-charged ion.

Front

What is the octet rule?

Back

Atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.

Front

What is the charge of a sodium ion?

Back

+1.

Front

What is the formula for the ionic compound formed between magnesium and chlorine?

Back

MgCl₂.

Front

What is the significance of valence electrons in bonding?

Back

Valence electrons determine how an atom can bond with others.