Unit 4 AP Chemistry

Choose the correct shape for this molecule:

• Trigonal planar

• Trigonal pyramidal

• Bent

• Tetrahedral

Which of the following is true about Ionic Bonds? (select ALL TRUE options)

• High melting point

• Low melting point

• Can dissolve in water

• Cannot dissolve in water

• Can conduct electricity

Why do atoms share electrons in covalent bonds?

• to become ions and attract each other

• to have a noble-gas electron configuration

• to increase their atomic numbers

• to lose extra electrons.

At 80'C, KBr's solubility is:

• 100

• 90

• 80

• 0

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

What is the study of matter and how it changes?

• Biology

• Physics

• Chemistry

• Geology

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-3

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Select the subatomic particle that has a mass of 1 AMU.

Tags

NGSS.MS-PS1-1

Which of the following shows the correct conjugate acid base pair?

• HCI (acid) / H₃O⁺ (conjugate base)

• HCI (acid) / CI^- (conjugate base)

• HCI (base) / CI^- (conjugate acid)

• HCI (base) / H₃O⁺ (conjugate acid)

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.

• The atoms have more protons.

• The atoms have more energy levels

• The atoms have more nuetrons

Tell which solution is the most concentrated,

• Mixture 1

• Mixture 2

• Mixture 3

• Mixture 4

What is the oxidation number of S₈?

• 0

• 8

• 6

• 16