How many VALENCE ELECTRONS does Chlorine have?

• 2

• 7

• 8

• 10

• 17

Ionic bonds are formed when electrons get

• Shared between two atoms

• Removed from both atoms

• Transferred from one atom to another

• Added to both atoms

Ionic bonds typically form between

• A metal and a nonmetal

• Two nonmetals

• Two metals

• A metalloid and a metal

What is the correct formula for Sodium Chloride?

• SCl

• NaCl

• SC

• NaCl₂

Metals (like Na) typically _____ electrons in the formation of ionic bonds.

• Gain

• Lose

• Keep the same

Nonmetals (like Cl) typically ____ electrons when they form ionic bonds.

• Gain

• Lose

• Keep the same

Ionic bonds form between two ions that have...

• ionic compounds
• negative charges
• positive charges
• opposite charges

A(n) _____________ is an atom or group of atoms that has an electric charge. 

• ion
• electron

When an atom loses a valence electron, it becomes a(n) _________ion.

• positive 
• negative

Why do ionic bonds form?

• so the number of protons equals the number of electrons

• to fill the outermost energy level to make the atom stable

• so an atom can become unstable