$$Weight = Mass \times Gravity$$

Question 1

Which of the following best describes the difference between matter and energy?

Accepted Answer

Matter is anything that has mass and occupies space, while energy is the capacity to do work or put matter into motion.

Question 2

A student turns on a lamp, converting electrical energy to light energy. What principle does this illustrate?

Accepted Answer

Energy form conversions

Question 3

Which of the following is NOT one of the four elements that make up 96% of the human body?

Accepted Answer

Phosphorus

Question 4

What is the atomic number of an element defined by?

Accepted Answer

The number of protons in the nucleus

Question 5

Which subatomic particle has no electrical charge and a mass of approximately 1 amu?

Accepted Answer

Neutron

Question 6

Isotopes of an element differ in which of the following?

Accepted Answer

Number of neutrons

Question 7

Which form of energy is stored in the bonds of chemical substances?

Accepted Answer

Chemical energy

Question 8

If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its atomic number and mass number?

Accepted Answer

Atomic number: 6, Mass number: 12

Question 9

Which of the following best explains why energy conversions in the body are inefficient?

Accepted Answer

Some energy is 'lost' as heat, which can be partly unusable

Question 10

A radioisotope is useful in medical imaging because:

Accepted Answer

It emits energy as it decays, which can be detected and measured

Question 11

Which equation correctly relates mass, gravity, and weight?

Accepted Answer

$$Weight = Mass 	imes Gravity$$

Question 12

Which statement about atoms is correct?

Accepted Answer

Atoms are electrically neutral because the number of protons equals the number of electrons.

Question 13

A patient is injected with a radioisotope for a PET scan. What property of the radioisotope makes this possible?

Accepted Answer

It emits radiation as it decays to a more stable form.

Question 14

Which of the following is the correct definition of kinetic energy?

Accepted Answer

Energy in action

Question 15

Which of the following subatomic particles is found in the nucleus and carries a positive charge?

Accepted Answer

Proton

Question 16

Which model of the atom is most useful for predicting chemical behavior?

Accepted Answer

Orbital model

Question 17

If an atom has an atomic number of 8 and a mass number of 16, how many neutrons does it have?

Accepted Answer

$$16 - 8 = 8$$ neutrons

Question 18

Which of the following forms of energy is directly involved in moving matter?

Accepted Answer

Mechanical energy

Question 19

Which statement about the periodic table is correct?

Accepted Answer

It lists all known elements, with 92 occurring in nature.

Question 20

Which of the following is true regarding electrons in an atom?

Accepted Answer

They carry a negative charge and have virtually no mass.

Chapter 2: Chemistry Comes Alive – Basic Chemistry for Anatomy & Physiology

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