AP Chemistry Unit 2

In the nitrite ion (NO₂^-), __________.

• both bonds are single bonds

• both bonds are double bonds

• both bonds are the same because of resonance

• there are 20 valence electrons

• there is one single and one double bond

Tags

NGSS.HS-PS1-2

The ability of an atom in a molecule to attract electrons is best quantified by the ______.

• electronegativity

• paramagnetism

• diamagnetism

• electron change-to-mass ratio

• first ionization energy

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A valid Lewis structure of _______ cannot be drawn without violating the octet rule.

• NF₃

• IF₃

• PF₃

• SbF₃

• SO₄^2-

Which atom can accommodate an octet of electrons, but doesn't necessarily have to accommodate an octet?

• N

• C

• H

• O

• B

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the resonance form of ozone shown, the formal charge on the central oxygen atom is _______.

• 0

• +1

• -1

• +2

• -2

Tags

NGSS.HS-PS1-2

As the number of covalent bonds between two atoms increases, the distance between the atoms ______ and the strength of the bond between them ______.

• increases, increases

• decreases, decreases

• increases, decreases

• decreases, increases

• is unpredictable

The Lewis structure of the CO₃^2- ion is

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS1-2

Which of these bonds takes the most energy to break?

• single

• double

• triple

• quadruple

Tags

NGSS.HS-PS1-4

The ion NO- has _____ valence electrons.

• 10

• 12

• 14

• 15

• 16

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Potassium iodide, KI,has the following bonding:

• ionic

• metallic

• nonpolar covalent

• polar covalent

Tags

NGSS.HS-PS1-2