Question 1

Which experiment is depicted in the first image, and what fundamental property of the electron did it help determine?

Accepted Answer

The Millikan oil drop experiment; it determined the elementary charge of the electron.

Question 2

In the gold foil experiment (second image), what observation led to the conclusion that atoms have a small, dense nucleus?

Accepted Answer

Some alpha particles were deflected at large angles.

Question 3

According to the Bohr model (fifth image), what happens when an electron transitions from $$n=4 to$$ $$n=2$$?

Accepted Answer

The atom emits energy as a photon with a specific wavelength.

Question 4

Which of the following best describes the difference between the ground state and excited state of an electron (sixth image)?

Accepted Answer

The ground state is the lowest energy state, while the excited state is any higher energy state.

Question 5

What does the seventh image illustrate about the probability distribution of electrons in an atom?

Accepted Answer

Electrons have a high probability of being found close to the nucleus, but can be found at varying distances.

Question 6

Refer to the eighth image. According to the Aufbau principle, which orbital is filled immediately after $$3p$$?

Accepted Answer

$$4s$$

Question 7

What information does the electron configuration '1s$$^1$$' (ninth image) provide about a hydrogen atom?

Accepted Answer

It has one electron in the first shell, s subshell.

Question 8

Based on the periodic trend shown in the eleventh image, which element would you expect to have the highest first ionization energy?

Accepted Answer

Helium (He)

Question 9

The thirteenth image shows a periodic trend in atomic radius. Which statement best explains why atomic radius decreases across a period?

Accepted Answer

The nuclear charge increases, pulling electrons closer.

Question 10

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 11

In the context of chemical bonding (seventeenth image), what type of bond is formed when electrons are transferred from one atom to another?

Accepted Answer

Ionic bond

Question 12

Which molecular geometry is associated with a bond angle of $$109.5^\circ ($$nineteenth image)?

Accepted Answer

Tetrahedral

Question 13

Refer to the Lewis structure in the twenty-third image. What is the formal charge on the central boron atom in $$BF_3$$?

Accepted Answer

0

Question 14

Which of the following best describes the difference between a sigma ($$\sigma) $$bond and a pi ($$\pi) $$bond (twenty-sixth and twenty-seventh images)?

Accepted Answer

$$\sigma$$ bonds result from end-to-end overlap; $$\pi$$ bonds from side-to-side overlap.

Question 15

Which orbital is spherical in shape (twenty-ninth image)?

Accepted Answer

$$2s$$

Atomic Structure and Chemical Bonding: Foundations for Organic Chemistry

Study Guide - Practice Questions

Study Guide - Flashcards