Question 1

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

Accepted Answer

Gamma rays

Question 2

A thunderstorm is observed first by lightning and then by thunder. This is because:

Accepted Answer

Light travels much faster than sound

Question 3

What is the relationship between the wavelength ($$\lambda) $$and frequency ($$
u) of $$electromagnetic radiation?

Accepted Answer

$$c = \lambda 
u$$

Question 4

Which color of visible light has the highest energy?

Accepted Answer

Violet

Question 5

When an electron in an atom absorbs energy and moves to a higher energy level, this state is called:

Accepted Answer

Excited state

Question 6

How many electrons can be held in the third energy level ($$n=3) of an $$atom?

Accepted Answer

18

Question 7

Which of the following statements about atomic spectra is TRUE?

Accepted Answer

Atomic spectra are unique to each element and result from electron transitions between energy levels.

Question 8

Which sublevel contains a maximum of 10 electrons?

Accepted Answer

d

Question 9

What is the electron configuration for magnesium (Mg, atomic number 12)?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$

Question 10

Which of the following elements has the largest atomic size?

Accepted Answer

Potassium (K)

Question 11

Which element would have the highest ionization energy?

Accepted Answer

Fluorine (F)

Question 12

Which of the following best describes the trend in metallic character across a period from left to right?

Accepted Answer

Metallic character decreases

Question 13

How many p orbitals are present in a single energy level?

Accepted Answer

3

Question 14

Which of the following is a correct abbreviated electron configuration for sodium (Na)?

Accepted Answer

$$[Ne] 3s^1$

Question 15

Which of the following statements about Hund’s Rule is correct?

Accepted Answer

Electrons occupy separate orbitals of the same energy before pairing up.

Question 16

Which of the following elements is most likely to lose electrons easily and exhibit metallic character?

Accepted Answer

Sodium

Question 17

A photon of which type of electromagnetic radiation would have the greatest energy?

Accepted Answer

X-ray

Question 18

Which of the following is the correct order of filling for the sublevels in the fourth period of the periodic table?

Accepted Answer

4s, 3d, 4p

Question 19

Which of the following best explains why atomic size increases as you move down a group in the periodic table?

Accepted Answer

The number of energy levels increases

Question 20

Which of the following electron configurations represents a transition metal?

Accepted Answer

$$[Ar] 4s^2$ 3d^5$

Quantum Mechanics, Atomic Structure, and Periodic Properties: Study Notes for General Chemistry

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