$$\text{Atomic Mass} - \text{Atomic Number}$$

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

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

Accepted Answer

Proton

Question 2

How many electrons can the second energy level of an atom hold?

Accepted Answer

$$8$$

Question 3

A neutral atom of carbon has an atomic number of 6 and an atomic mass of 12. How many neutrons does it have?

Accepted Answer

$$6$$

Question 4

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

Accepted Answer

Covalent bond

Question 5

Water is considered a polar molecule because:

Accepted Answer

Oxygen has a stronger pull on electrons, creating an uneven distribution of charge

Question 6

Which property of water allows insects to walk on its surface, as shown in the image?

Accepted Answer

Surface tension due to cohesion

Question 7

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

Accepted Answer

$$	ext{Atomic Mass} - 	ext{Atomic Number}$$

Question 8

Which of the following is an example of a compound?

Accepted Answer

Salt ($$NaCl)$$

Question 9

If sodium ($$Na) $$loses one electron, what is its resulting charge?

Accepted Answer

$$+1$$

Question 10

Which type of bond is responsible for holding water molecules together?

Accepted Answer

Hydrogen bond

Question 11

A solution has a pH of 3.0. Which of the following best describes this solution?

Accepted Answer

It is acidic

Question 12

Which property of water is most important for regulating temperature in living organisms?

Accepted Answer

High specific heat capacity

Question 13

What is the main difference between an isotope and an ion?

Accepted Answer

Isotopes have different numbers of neutrons; ions have different numbers of electrons

Question 14

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

Accepted Answer

Adhesion between water and glass

Question 15

Which of the following chemical equations correctly represents cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 16

Which of the following is true about the atomic number of an element?

Accepted Answer

It represents the number of protons

Question 17

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of a solute dissolved in a solvent

Question 18

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

Accepted Answer

Sweating in humans

Question 19

If an atom has 10 electrons, how are they distributed among the energy levels?

Accepted Answer

2 in the first, 8 in the second

Question 20

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

Accepted Answer

Nonpolar nature

Fundamental Concepts in General Chemistry: Atoms, Elements, Bonding, Water, and pH

Study Guide - Practice Questions