Chemical Bonding Worksheet (Page 2 of 4) in pdf

Chemical Bonding Worksheet Page 2

Grade 9 Science Related Reading/Materials

How Do Ionic Compounds Form?

Nonmetal atoms gain electrons The outermost energy

level of a nonmetal is almost full. It is easier for it to fill its outer

Compare: As you

energy level by gaining electrons than by losing electrons.

read, make a chart

Metal atoms lose electrons Most metal atoms have few

comparing covalent

valence electrons, so they tend to lose electrons.

bonds and ionic

Ionic bonds form because positive ions are attracted

to negative ions. When ionic bonds form, the number of

electrons lost by metal atoms equals the number of electrons

gained by nonmetal atoms. The atoms in Group 8 have full

outermost energy levels. Therefore, they do not usually

Identify What type

form bonds.

of bond joins the

What Are Covalent Bonds?

atoms in molecules?

Another type of bond is a covalent bond. A covalent

________________

bond forms when atoms share electrons. Covalent bonds

________________

most often form between atoms of nonmetals. Remember

________________

that most nonmetals can fill the outermost energy level

by gaining an electron. When a covalent bond forms, both

atoms are able to fill their outermost energy level. They

do this by sharing electrons

between the two atoms.

Apply Concepts

Atoms that join with each other by covalent bonds form

Hydrogen has one

particles called molecules.

valence electron.

Draw an electron-

dot diagram of a

hydrogen atom

below:

Work sheet

Chemical Bonding Worksheet Page 2