AP Chemistry Semester 1 Review

Which of the following is NOT isoelectronic with the other species?

• S^2-

• Br^-

• Kr

• Sr²⁺

Tags

NGSS.HS-PS1-1

Which of the following subshells has the lowest energy?

• 4d

• 5s

• 5p

• 5f

What is ionization energy?

• How well an atom attracts electrons in a chemical bond

• The relative size of an atom

• An atom that has gained or lost an electron

• The amount of energy it takes to remove an electron from the valence shell of an atom

Tags

NGSS.HS-PS1-2

Which of the following has the lowest 2nd ionization energy?

• N

• Mg

• K

• Cl

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element has the largest atomic radius?

• B

• Al

• Ca

• Mg

Tags

NGSS.HS-PS1-1

Which element has electrons in the greatest number of subshells when it is in its ground state?

• C

• Na

• Ar

• Fe

Which element could #3 be based on ionization energy?

• Na

• Mg

• Al

• Si

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is NOT true about ionic compounds?

• They conduct electricity when in the liquid state

• They are comprised of positive and negative ions

• They are ductile (can be made into wire)

• They are brittle (break easily)

Tags

NGSS.HS-PS1-3

Which Lewis dot structure shows exactly two unshared pairs of valence electrons?

• H₂S

• CO₂

• NH₃

• CBr₄

What is the formal charge of Cl?

• 0

• +1

• -1

• -2

Tags

NGSS.HS-PS1-1