Chemical bonds

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-PS1-2

What molecule is this?

• CO
• CO2
• C2O
• C2O2

Tags

NGSS.MS-PS1-1

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

• 1
• 3
• 4
• 5

Tags

NGSS.HS-PS1-1

What is ionization energy?

• Energy needed to destroy an atom
• Energy required to remove an electron
• Energy needed to split an electron
• Energy required to add an electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS1-1

Valence electrons are the...

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• gain

• lose

• share

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• gain

• lose

• share

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Ionic bonds form between metals and ____.

• metalloids
• metals
• nonmetals

What is the formula of Sodium oxide?

• Na2O
• NaO₂
• Na₂O₂
• Na₂O

Tags

NGSS.MS-PS1-1