Chemical Bonding

All of the statements below are false as written. Write a term or phrase that makes the statement true when it is substituted for the underlined words.

The properties of a compound are the same as the properties of the elements that it contains.

Different

Superscript numbers in chemical formulas tell how many atoms of each element are found in a unit of compound.

Superscript

All the noble gases except helium have 18 electrons in their outer energy level.

Eight

A (n) chemical formula is the force that holds atoms together in a compound.

chemical bond

An ion is a neutral particle that has either more ore fewer electrons than protons.

charged

Oxidation numbers are written as subscripts

Superscripts

A covalent bond is the force of attraction between the opposite charges of the ions in an ionic compound.

Ionic bond

The charge on a compound is always positive

Neutral

Equal sharing of electrons in covalent bonds result in polar molecules

Unequal

A binary compound contains five different elements.

Two

An oxidation number tells how many protons an atom must gain, lose or share to become stable.

Electrons

The oxidation number of the copper (II) ion is 3+.

2+

When writing chemical formulas, add superscripts so that the sum of the oxidation numbers equals ten.

zero

A polyatomic ion never has a positive or negative charge.

Always

The polyatomic ion SO₄^2- is called the sulfide ion.

Sulfate