quiz 1 in chemistry Flashcards

Choose the paramagnetic species from below.

O²⁻

Zn

Ca

Cd²⁺

Nb³⁺

Each of the following sets of quantum numbers is supposed to specify an orbital. Which of the following sets of quantum numbers contains an error?

n = 1, l = 0, m_l =0

n = 3, l = 0, m_l =0

n = 3, l =3 , m_l = -2

n = 2, l = 1 , m_l = -1

n = 4, l = 2, m_l =0

Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does not contain an error.

n = 4, l = 4, m_l =0

n = 3, l = 1, m_l = -2

n = 4, l = 0, m_l =-1

n = 5, l = 3, m_l =-3

n = 3, l = 2, m_l =+3

Give the ground state electron configuration for Se.

[Ar]4s²3d¹⁰

[Ar]4s²4d¹⁰4p⁴

[Ar]3d¹⁰4p⁴

[Ar]4s²3d¹⁰4p⁶

[Ar]4s²3d¹⁰4p⁴

Give the ground state electron configuration for Sr.

[Kr]5s²5d¹⁰5p²

[Kr]5s²4d¹⁰5p²

[Kr]5s²4d²

[Kr]5s²

[Kr]5s²4d¹⁰

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

n = 4, l = 1, m_l = 1, m_s = -1/2

n = 5, l = 1, m_l =1 , m_s = -1/2

n = 5, l = 1, m_l = 0, m_s = +1/2

n = 5, l = 0, m_l = 0, m_s = -1/2

n = 4, l = 1, m_l = -1, m_s = +1/2

How many different values of m_l are possible in the 3d sublevel?

5

1

3

7

2

How many different values of m_l are possible in the 4f sublevel?

5

2

3

1

7

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

B Al S Cl

Answers:

2

1

4

3

How many sublevels are contained in the second shell (n=2) of a given atom?

3

1

4

9

2

How many unpaired electrons are present in the ground state Kr atom?

3

2

0

5

1

How many valence electrons does an atom of S have?

6

3

2

1

4

Identify the element that has a ground state electronic configuration of [Ar]4s²3d¹⁰4p¹.

Ga

Al

In

B

Identify the location of the visible range of light.

between microwave and radio

between gamma ray and ultraviolet

between x-ray and gamma ray

between x-ray and ultraviolet

between ultraviolet and infrared

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

2p

3s

3d

4f

1s

Place the following elements in order of increasing atomic radius.
P Ba Cl
Answers:

Ba < Cl < P

P < Cl < Ba

Ba < P < Cl

Cl < P < Ba

Cl < Ba < P

Place the following in order of increasing radius.
Br⁻ Na⁺ Rb⁺
Answers:

Rb⁺ < Br⁻ < Na⁺

Br⁻ < Rb⁺ < Na⁺

Rb⁺ < Na⁺ < Br⁻

Br⁻ < Na⁺ < Rb⁺

Na⁺ < Br⁻ < Rb⁺

Place the following types of electromagnetic radiation in order of increasing frequency.
visible light microwaves X-rays
Answers:

microwaves < visible light < X-rays

visible light < X-rays < microwaves

X-rays < microwaves < visible light

microwaves < X-rays < visible light

X-rays < visible light < microwaves

Refer to the figure. Place the following in order of increasing IE₁.
N F As
Answers:

As < N < F

N < As < F

F < N < As

F < N < As

As < F < N

What are the possible orbitals for n = 3?

s, p, d

s, p, d, f

s, p

s

When filling degenerate orbitals, electrons fill them singly at first, with parallel spins. This is know as

Aufbau principle

Hund's rule

Heisenberg uncertainty principle

Pauli's exclusion principle

Which of the following occur as the wavelength of a photon increases?

the energy increases

the frequency decreases

Planck's constant decreases

the speed decreases

None of the above occur as the wavelength of a photon increases.

Which of the following quantum numbers describes the shape of an orbital?

magnetic quantum number

principal quantum number

Schrödinger quantum number

spin quantum number

angular momentum quantum number

Which of the following statements is TRUE?

An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.

An orbital that penetrates into the region occupied by core electrons is more shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.

Two electrons in the same orbital can have the same spin.

It is possible for two electrons in the same atom to have identical values for all four quantum numbers.

None of the above are true.

Which of the following types of electromagnetic radiation has the shortest wavelength?

green

yellow

violet

blue

orange

Which of the following visible colors of light has the highest frequency?

orange

red

green

yellow

blue

Which reaction below represents the second ionization of Sr?

Sr⁺(g) + e⁻ → Sr(g)

Sr(g) → Sr⁺(g) + e⁻

Sr²⁺(g) + e⁻ → Sr⁺(g)

Sr⁺(g) → Sr²⁺(g) + e⁻

Sr^⁻(g) + e⁻ → Sr²⁻(g)

Which reaction below represents the second electron affinity of S?

S²⁻(g) → S⁻(g) + e⁻

S⁻(g) → S(g) + e⁻

S⁻(g) + e⁻ → S²⁻(g)

S(g) → S⁺(g) + e⁻

S(g) + e⁻ → S⁻(g)

Write out the orbital diagram that represents the ground state of As. How many unpaired electrons are there?

0

3

2

1

4