Chem Exam 4

Choose the valence orbital diagram that represents the ground state of Se2-

4s= up- down 4p= up- down, up-down, up-down

In which orbital below would an electron (on average) be furthest from the nucleus?

5d

Determine the shortest frequency of light required to remove an electron from a sample of Ti metal if the binding energy of titanium is 3.14 × 103 kJ/mol.

7.87 × 1015 Hz

How many of the following elements have 1 unpaired electron in the ground state? BAlSeCl

3

Of the following, which atom has the smallest atomic radius?

F

Identify the element that has a ground state electronic configuration of [Ar] 4s2 3d10 4p6.

Kr

Place the following in order of increasing radius. I-Mg2+K+

Mg2+ < K+ < I-

Identify the elements correctly shown by decreasing radii size.

N3- > N

What period 3 element has the following ionization energies (all in kJ/mol)? IE1 = 1012IE2 = 1900IE3 = 2910IE4 = 4960IE5 = 6270IE6 = 22,200

P

Which reaction below represents the electron affinity of S?

S(g) + e- → S-(g)

Place the following in order of decreasing metallic character. Si S P Cl

Si > P > S > Cl

Choose the diamagnetic species from below.

Sn2+

Which ion does NOT have a noble gas configuration in its ground state?

Sn2+

Give the ground state electron configuration for Te.

[Kr] 5s2 4d10 5p4

Give the ground state electron configuration for Rb+.

[Kr]5s1

The condensed electron configuration of magnesium, element 12, is ________.

[Ne] 3s2

The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is

chromium

Which of the following transitions (in a hydrogen atom) represent absorption of the smallest frequency photon?

n = 5 to n = 6

Which of the following quantum numbers describes the size and energy of an orbital?

principal quantum number

Identify the orbital (two flower petals)

px orbital

Place the following types of electromagnetic radiation in order of decreasing frequency.

radio waves < x-rays < gamma rays

Give the complete electronic configuration for Mn.

1s2 2s2 2p6 3s2 3p6 4s2 3d5

Give the complete electronic configuration for oxygen.

1s2 2s2 2px2 2py1 2pz1

Choose the orbital diagram that represents the ground state of N.

1s= up down 2s= up down 2p= up, up, up

What value of l is represented by a d orbital?

2

Choose the statement that is TRUE.

Core electrons effectively shield outer electrons from nuclear charge.

Identify the most reactive alkali metal with water.

Cs

Place the following elements in order of decreasing atomic radius. Xe Cs Ne

Cs > Xe > Ne

Identify the orbital (4 flower petals)

dyz orbital

If two electrons in the same atom have the same value of l, they are

in the same sublevel, but not necessarily in the same level.

Give the set of four quantum numbers that represent the last electron added (using the Aufbau principle) to the Zn atom.

n = 3, l = 2, ml = 2, ms = -1/2

Give the set of four quantum numbers that could represent the electron gained to form the Br ION from the Br atom.

n = 4, l = 1, ml = 1, ms = -1/2