AP Chemistry MCQ Unit 1-2

Consider the following electron configuraitons for neutral atoms

Atom A= 1s²2^s2p⁶3s²

Atom B= 1s²2^s2p⁶3s²3p¹

Atom C= 1s²2^s2p⁶3s²3p²

Which atom would be expected to have the largest fourth ionization energy?

• Atom A

• Atom B

• Atom C

• All of these atoms would be expected to have the same fourth ionization energy.

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NGSS.HS-PS1-1

The four spheres represent Na⁺, Mg²⁺,O², and F, not necessarily in that order. Which sphere most likely represnet the F^- ion?

• Sphere A

• Sphere B

• Sphere C

• Sphere D

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NGSS.HS-PS1-1

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The pictures represent alkali halide salts with the same ion charges.

Which salt has the lowest lattice energy?

• Picture A

• Picture B

• Picture C

• Picture D

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NGSS.HS-PS1-3

As the number of bonds between two carbon atoms increases, which of the following increases?

• Bond length

• Bond strength

• Both bond length and bond strength

• Neither bond length nor bond strength

When bonding with a chlorine atom which of the following atoms will yield the least polar bond?

• I

• P

• S

• Ca

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NGSS.HS-PS1-1

In the molecule shown below, what ar ethe approximate bond angles for a, b, and c respectively?

• a=90^o,b= 90^o,c= 90^o,

• a=90^o,b= 120^o,

  c= 180^o,

• a=109.5^o,b= 120^o,

  c= 180^o,

• a=109.5^o,b= 90^o,

  c= 180^o,

Which of the following choices consists of a pair of isotopes?

• ¹⁴C and ¹⁴N

• ²³Na and ²⁵Na

• ¹H and ¹H⁺

• ³⁵CI and ³⁵CI^-

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NGSS.HS-PS1-8

In an experiment, 25.0-g samples of four different elements fromt eh fourth period of the periodic table were measured out. The four elements are calcium, chromium, cobalt and copper. Which sample contained the least number of atoms?

• Ca

• Cr

• Co

• Cu

The table shows the first ionization energies of element X in Kj/mol

First IE Second IE Third IE

738 7750 9125

• X₂Y

• XY₂

• XY₃

• X₃Y

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NGSS.HS-PS1-1

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When observing PES of individual elements, which of the following pairs of elements would have the lowest energy peaks at different heights?

• Na and AI

• Mg and C

• Na and C

• H and AI

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NGSS.HS-PS1-1

NGSS.HS-PS1-2