Question 1

Which subatomic particle is responsible for the positive charge of an atom?

Accepted Answer

Proton

Question 2

What is the atomic number of an element defined by?

Accepted Answer

The number of protons in the nucleus

Question 3

If a carbon atom has 6 protons and 7 neutrons, what is its mass number?

Accepted Answer

$$13$$

Question 4

Which of the following best describes an emergent property?

Accepted Answer

A property that arises only when elements combine to form compounds

Question 5

What is the main difference between polar and non-polar covalent bonds?

Accepted Answer

Polar covalent bonds involve unequal sharing of electrons due to differences in electronegativity, while non-polar covalent bonds involve equal sharing.

Question 6

Which element is the most electronegative among the following: Hydrogen, Carbon, Nitrogen, Oxygen?

Accepted Answer

Oxygen

Question 7

What type of bond is formed when one atom donates an electron to another atom, resulting in oppositely charged ions?

Accepted Answer

Ionic bond

Question 8

How many electrons can the second electron shell hold?

Accepted Answer

$$8$$

Question 9

Which of the following is considered a trace element in the human body?

Accepted Answer

Iron

Question 10

A nitrogen atom has 7 protons, 7 neutrons, and 7 electrons. What is its atomic mass in Daltons?

Accepted Answer

$$14 Da$$

Question 11

Which statement about stable isotopes is correct?

Accepted Answer

Stable isotopes have the same number of protons but different numbers of neutrons.

Question 12

What happens to an atom when it loses an electron?

Accepted Answer

It becomes positively charged

Question 13

Which type of chemical bond is responsible for the attraction between water molecules?

Accepted Answer

Hydrogen bond

Question 14

What is the balanced chemical equation for the formation of water from hydrogen and oxygen?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 15

Which of the following best describes chemical equilibrium?

Accepted Answer

The rate of the forward reaction is equal to the rate of the reverse reaction.

Question 16

Which force is the weakest but can be collectively strong due to many interactions?

Accepted Answer

Van der Waals force

Question 17

If a neutron splits into a proton and an electron, what type of atomic change has occurred?

Accepted Answer

The atom undergoes radioactive decay

Question 18

Which element is inert and does not want to lose or gain electrons?

Accepted Answer

Neon

Question 19

Which of the following molecules contains polar covalent bonds?

Accepted Answer

Water ($$H_2O)$$

Question 20

What is the main reason atoms form chemical bonds?

Accepted Answer

To achieve a full outer electron shell

Chapter 2 Lecture slides/notes

Study Guide - Practice Questions

Study Guide - Flashcards