U3/4: Chemical Bonding and Formulas

Why do elements bond?

• To be friends

• To create a new element

• To become stable

• To get bigger

Ionic bonds are between...

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

Tags

NGSS.HS-PS1-3

Covalent bonds are between...

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

Tags

NGSS.HS-PS1-1

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

• -2
• -1
• +1
• +2

Tags

NGSS.HS-PS1-7

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

• -2
• -1
• +1
• +2

What kind of bond forms when atoms transfer electrons?

• ionic
• covalent
• metallic

• molecular

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

Tags

NGSS.HS-PS1-1

The octet rules states that most elements want to have _____ valence electrons.

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Predict the bond that will form between Be and F.

• Ionic
• Covalent

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Predict the bond that will form between Se and Cl.

• Ionic
• Covalent

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2