Question 1

Which subatomic particle is responsible for the identity of an element and is found inside the nucleus?

Accepted Answer

Proton

Question 2

What is the maximum number of electrons that can be held in the first energy level of an atom?

Accepted Answer

$$2$$

Question 3

If an atom has an atomic number of $$11$$ and an atomic mass of $$23$$, how many neutrons does it have?

Accepted Answer

$$12$$

Question 4

Which of the following best describes an ion?

Accepted Answer

A charged particle due to a change in the number of electrons

Question 5

What type of bond is formed when two atoms share electrons unequally, resulting in partial charges?

Accepted Answer

Polar covalent bond

Question 6

Which property of water allows it to absorb large amounts of heat before changing temperature?

Accepted Answer

High specific heat capacity

Question 7

A solution is made by dissolving $$5$$ grams of salt in $$100 mL of $$water. In this solution, what is the solvent?

Accepted Answer

Water

Question 8

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have different numbers of neutrons

Question 9

What is the pH of pure water?

Accepted Answer

$$7$$

Question 10

Which of the following is a real-life example of evaporative cooling?

Accepted Answer

Sweating

Question 11

If sodium ($$Na) $$loses one electron to become $$Na^+$$, how many electrons does it have if its atomic number is $$11$$?

Accepted Answer

$$10$$

Question 12

Which type of bond holds water molecules together due to their polarity?

Accepted Answer

Hydrogen bond

Question 13

What is the correct electron configuration for an atom with $$10$$ electrons?

Accepted Answer

$$2 in $$the first level, $$8 in $$the second level

Question 14

Which of the following is a compound?

Accepted Answer

Water ($$H_2O)$$

Question 15

What is the atomic number of carbon?

Accepted Answer

$$6$$

Question 16

Which property of water allows it to climb up a thin tube against gravity?

Accepted Answer

Capillary action

Question 17

What is the result when hydrochloric acid ($$HCl) is $$added to water?

Accepted Answer

Formation of $$H^+$$ and $$Cl^-$$ ions

Question 18

Which of the following best explains why water is an excellent solvent?

Accepted Answer

Water has high polarity

Question 19

A molecule of $$CO_2$$ contains how many oxygen atoms?

Accepted Answer

$$2$$

Question 20

Which of the following is true about the number of protons in an atom?

Accepted Answer

It is always equal to the atomic number

Basic Chemistry: Atoms, Elements, Bonds, and Water

Study Guide - Practice Questions