Atoms and bonds

Why do elements bond?

• To be friends

• To create a new element

• To become stable

• To get bigger

What is a valence electron?

• The sum of neutrons and protons.
• The # of electrons in the last shell.
• A type of bond.
• A popular compound.

Ionic bonds are between...

• nonmetals and nonmetals
• carbon and oxygen
• metals and nonmentals
• hydrogen and chlorine

Covalent bonds are between...

• two or more nonmetals
• sodium and chlorine
• metals and metals
• metals and nonmetals

What is the name for an ion with a positive charge?

• cation
• anion
• onion
• union

What is the name for an ion with a negative charge?

• cation
• anion
• onion
• union

What kind of bond forms when atoms exchange electrons?

• ionic
• covalent
• artificial
• univalent

If an atom loses two electrons what charge will it have?

• -2
• -1
• +1
• +2

If an atom gains two electrons what charge will it have?

• -2
• -1
• +1
• +2

Which of the following describes covalent bonds?

• Bonds form because of opposite charges

• electrons are shared to fill outer electron shells

• Electrons are transferred between atoms

• Covalent bonds are magical