Formulas for Binary Compounds

Front

What is the charge of a selenium ion (Se)?

Back

Selenium typically forms an ion with a 2- charge.

Front

What is the chemical formula for the ionic compound formed between potassium (K) and oxygen (O)?

Back

The chemical formula is K₂O.

Front

What charge does a calcium ion (Ca) have?

Back

Calcium ion has a +2 charge.

Front

Define an anion.

Back

An anion is a negatively charged ion.

Front

What is the formula for the compound formed by sodium (Na) and sulfur (S)?

Back

The formula is Na₂S.

Front

What is the general rule for determining the charge of a monatomic ion?

Back

The charge of a monatomic ion is typically equal to the number of electrons lost or gained to achieve a noble gas configuration.

Front

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

Back

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

Front

How do you determine the formula for an ionic compound?

Back

To determine the formula, balance the total positive and negative charges of the ions.

Front

What is the charge of a sodium ion (Na)?

Back

Sodium ion has a +1 charge.

Front

What type of bond is formed between metals and nonmetals in ionic compounds?

Back

Ionic bonds are formed through the transfer of electrons from metals to nonmetals.