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

A neutral atom of sodium (Na) 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 particle with a different number of protons than electrons

Question 5

Which type of bond involves the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Question 6

Water (H2O) is considered a polar molecule because:

Accepted Answer

Oxygen pulls electrons more strongly than hydrogen

Question 7

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

Accepted Answer

High specific heat capacity

Question 8

A solution is made by dissolving iced tea mix in water. In this solution, water acts as the:

Accepted Answer

Solvent

Question 9

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons

Question 10

What is the pH of pure water?

Accepted Answer

7

Question 11

Which of the following best explains why water forms a meniscus in a graduated cylinder?

Accepted Answer

Adhesion between water and glass causes the meniscus

Question 12

If an atom has 16 electrons, how many electrons are in its second energy level?

Accepted Answer

8

Question 13

Which of the following is a compound?

Accepted Answer

Sodium chloride (NaCl)

Question 14

Which of the following is true about hydrogen bonds?

Accepted Answer

They are responsible for holding water molecules together

Question 15

A chemical equation is balanced when:

Accepted Answer

The number of atoms of each element is the same on both sides

Question 16

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

Accepted Answer

Sweating

Question 17

What is the correct formula to calculate the number of neutrons in an atom?

Accepted Answer

atomic&#xA0;mass&#xA0;-&#xA0;atomic&#xA0;number

Question 18

Which of the following best describes a molecule?

Accepted Answer

A group of atoms held together by covalent bonds

Question 19

If a solution has a pH of 13, which of the following is true?

Accepted Answer

It has more OH- ions than H+ ions

Question 20

Which of the following is NOT a property of water that is important for life?

Accepted Answer

Low polarity

Basic Chemistry Concepts for General Chemistry

Study Guide - Practice Questions