Chemical Bonds

What is the main reason why atoms form chemical bonds?

• To have a stable electron configuration

• To increase overall energy

• To create more electrons

• To attract protons

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

What molecule is this?

• CO
• CO2
• C2O
• C2O2

How many electrons should Nitrogen have around its Lewis dot model?

• 1
• 3
• 4
• 5

For representative elements (Groups 1A - 8A), the number of valence electrons is equal to

• the group number

• the period number

• the atomic number

• the group number minus 10

Valence electrons are the...

• Innermost electrons
• Middle electrons
• Outermost electrons
• Any electrons

For metals (groups 1-3), its easier to _____ electrons to have a full outer shell.

• gain

• lose

• share

For nonmetals (grousp 5-7), its easier to _____ electrons to have a full outer shell.

• gain

• lose

• share

Ionic bonds form between metals and ____.

• metalloids
• metals
• nonmetals

What is the formula of Sodium oxide?

• Na2O
• NaO₂
• Na₂O₂
• Na₂O