IB Chemistry Option D

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

If electrons are shared unequally then the bond is....

• Non-polar covalent
• Ionic
• Non-polar ionic
• Polar covalent

Which is the correct structure for NH₃?

Pictures correspond with a-d.

• Option A.

• Option B.

• Option C.

• Option D.

Tags

NGSS.HS-PS1-3

In a Lewis dot structure, what do you do with the available number of valence electrons if your ion is 2- charged?

• Add 2 valence electrons

• Subtract 2 valence electrons

• Multiply the valence number by 2

• Divide the valence number by 2

Which of the following is the correct Lewis structure for CH₂O?

• Option A

• Option B

• Option C

• Option D

Tags

NGSS.HS-PS1-1

In the correct Lewis structure for water, how many lone pairs of electrons will oxygen have?

• 1

• 4

• 3

• 2

Tags

NGSS.MS-PS1-1

Which of the following is the correct Lewis dot structure for Hydrogen Cyanide, HCN?

• A

• B

• C

• D

Which Lewis dot structure is correct for chloromethane (CH₃Cl)

• A

• B

• C

• D

Covalent compounds

• Share electrons
• transfer electrons
• contain a sea of electrons
• conduct electricity