Question 1

Which statement best describes the relationship between protons and electrons in a neutral atom?

Accepted Answer

The number of protons equals the number of electrons.

Question 2

A carbon atom has 6 protons and 6 neutrons. What is its atomic mass?

Accepted Answer

$$12$$

Question 3

Which of the following best explains why the atomic mass of hydrogen is $$1.0079$$ and not a whole number?

Accepted Answer

It is the average mass of all hydrogen isotopes based on their natural abundance.

Question 4

Which element is the most abundant in the human body by mass?

Accepted Answer

Oxygen

Question 5

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 6

Which of the following is a correct match between a mineral element and its chemical symbol?

Accepted Answer

Calcium - Ca

Question 7

Which statement about electron shells is correct?

Accepted Answer

The third shell can hold up to 18 electrons but is stable with 8 electrons (octet rule).

Question 8

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

Accepted Answer

Iron

Question 9

A solution is formed when glucose is dissolved in water. Which statement best describes this mixture?

Accepted Answer

Glucose is the solute and water is the solvent; particles do not settle out.

Question 10

Which of the following best describes a suspension?

Accepted Answer

Particles are visible and do settle out.

Question 11

Which of the following is NOT a property of metals as described in the periodic table?

Accepted Answer

They exist as gases or brittle solids.

Question 12

Which subatomic particle is responsible for the identity of an element?

Accepted Answer

Proton

Question 13

Which of the following mixtures is best described as a colloid?

Accepted Answer

Milk

Question 14

Which of the following statements about isotopes is correct?

Accepted Answer

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

Question 15

Which element is NOT a major element of the human body?

Accepted Answer

Potassium

Question 16

If an atom has 17 protons, 18 neutrons, and 17 electrons, what is its atomic number and atomic mass?

Accepted Answer

Atomic number: $$17$$, Atomic mass: $$35$$

Question 17

Which of the following best describes the octet rule?

Accepted Answer

Atoms are most stable with 8 electrons in the outermost shell.

Question 18

Which of the following is a correct match between a trace element and its chemical symbol?

Accepted Answer

Copper - Cu

Question 19

Which of the following is NOT a type of mixture found in the human body?

Accepted Answer

Compound

Question 20

Which of the following best describes the location and charge of neutrons in an atom?

Accepted Answer

Located in the nucleus; neutral charge

Introduction to Chemistry for Anatomy & Physiology: Atoms, Elements, and Mixtures

Study Guide - Practice Questions