chemical 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.

What kind of bond forms when atoms exchange electrons?

• ionic
• covalent
• artificial
• univalent

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

Predict the bond that will form between Be and F.

• Ionic
• Covalent

Predict the bond that will form between Se and Cl.

• Ionic
• Covalent

Predict the bond that will form between Sr and S.

• Ionic
• Covalent

Chlorine and Fluorine are both very electronegative, as they are both missing a single electron from their valence energy level.  Why is Fluorine more electronegative than Chlorine? 

• Fluorine has less energy levels.
• Chlorine has more electrons in its outer shell
• Fluorine has more protons.
• None of these

All solids at room temperature

• ionic compounds
• covalent compounds