Question 1

Which of the following best describes the relationship between the wavelength ($$\lambda) $$and frequency ($$
u) of $$electromagnetic radiation?

Accepted Answer

They are inversely proportional to each other.

Question 2

A sodium vapor lamp emits yellow light with a wavelength of 589 nm. What is the frequency ($$
u) of $$this light? (Speed of light $$c = 3.00 	imes 10^8$ m/s)

Accepted Answer

$$5.09 	imes 10$$^{14}$$ Hz

Question 3

Which equation correctly relates the energy of a photon ($$E) to $$its frequency ($$
u$$)?

Accepted Answer

$$E = h
u$$

Question 4

A laser emits light with a frequency of $$4.69 	imes 10$$^{14}$$ s$$^{-1}$$. What is the energy of one photon of this radiation? (h = 6.626$$ 	imes $$10^{-34} J$$·s)

Accepted Answer

$$3.11 	imes 10$$^{-19}$$ J

Question 5

Which phenomenon provided evidence that light behaves as both a wave and a particle?

Accepted Answer

Photoelectric effect

Question 6

According to the Bohr model, what happens when an electron in a hydrogen atom transitions from $$n=4 to$$ $$n=2$$?

Accepted Answer

A photon is emitted and energy is released.

Question 7

Calculate the energy change ($$\Delta E) $$when an electron in a hydrogen atom moves from $$n=6 to$$ $$n=2$$. ($$E = -2.18 	imes 10$$^{-18}$$ \frac{1}{n^2$} J)$$

Accepted Answer

$$-4.85 	imes 10$$^{-19}$$ J

Question 8

Which of the following transitions in a hydrogen atom would result in the absorption of energy?

Accepted Answer

From $$n=2 to$$ $$n=6$$

Question 9

The de Broglie wavelength ($$\lambda) of a $$particle is given by which equation?

Accepted Answer

$$\lambda = \frac{h}{mv}$$

Question 10

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 11

How many electrons can occupy the $$n=3$$ shell in an atom?

Accepted Answer

18

Question 12

Which set of quantum numbers is NOT allowed?

Accepted Answer

$$n=3,\ l=0,\ m_l=1$$

Question 13

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

Accepted Answer

Pauli exclusion principle

Question 14

What is the condensed (noble-gas) electron configuration for calcium (Ca)?

Accepted Answer

[Ar] $$4s^2$$

Question 15

Which of the following ions is isoelectronic with neon (Ne)?

Accepted Answer

Mg$$^{2+}$$

Question 16

Which of the following best describes Hund's rule?

Accepted Answer

Electrons occupy degenerate orbitals singly before pairing.

Question 17

How many unpaired electrons are present in the ground state electron configuration of nitrogen (N)?

Accepted Answer

3

Question 18

Which of the following statements about core and valence electrons is correct?

Accepted Answer

Valence electrons are found in the highest energy level and participate in bonding.

Question 19

Which electron configuration represents a transition metal ion with a filled d-subshell?

Accepted Answer

[Ar] $$3d^{10}$$

Question 20

Which of the following transitions in the hydrogen atom emits a photon in the visible region of the electromagnetic spectrum?

Accepted Answer

From $$n=3 to$$ $$n=2$$

Chapter 6: Electronic Structure of Atoms – Study Notes

스터디 가이드 - 연습 문제

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