Download Chpt.2.1 Completion Complete each statement. 1. When a change

Chpt.2.1
Completion
Complete each statement.
1. When a change in matter alters the basic nature of the substance, it is called a ____________________
change.
2. Inactive or stored energy is called ____________________ energy.
3. The sum of the protons and neutrons in an atom is called the ____________________.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
4. Inactive energy is referred to as:
a. mechanical energy
b. potential energy
c. kinetic energy
d. radiant energy
e. electrical energy
____
5. The movement of ions across cell membranes is an example of:
a. radiant energy
b. chemical energy
c. electrical energy
d. mechanical energy
e. potential energy
____
6. Ninety-six percent of the human body is composed of the elements:
a. carbon, calcium, sodium, and oxygen
b. carbon, oxygen, iron, and potassium
c. carbon, oxygen, hydrogen, and nitrogen
d. calcium, magnesium, potassium, and iron
e. sodium, potassium, hydrogen, and sulfur
____
7. The most abundant element in the human body is:
a. carbon
b. oxygen
c. hydrogen
d. nitrogen
e. calcium
____
8. The simplest atom—containing one proton, one electron, and no neutrons—is:
a. carbon
b. hydrogen
c. oxygen
d. nitrogen
e. sodium
____
9. Atomic mass is equivalent to the number of _____ in an atom.
a. protons
b. neutrons
c. electrons
d. protons and electrons
e. protons and neutrons
____ 10. Which of these elements composes bone:
a. calcium
b. sulfur
c. chlorine
d. iron
e. iodine
____ 11. Which of the following is the role of magnesium:
a. it is present in bone, and is an important cofactor for enzyme activity in a number of
metabolic reactions
b. it is needed to make functional thyroid hormones
c. it is a component of the functional hemoglobin molecule that transports oxygen within red
blood cells, as well as a component of some enzymes
d. it is the major extracellular cation in its ionic form, and is important for water balance,
conduction of nerve impulses, and muscle contraction
e. it is a major extracellular anion in its ionic form
____ 12. Which of the following statements is correct regarding the electrical charge of subatomic particles:
a. protons are positively charged, electrons are neutral, and neutrons are negatively charged
b. protons are positively charged, electrons are negatively charged, and neutrons are neutral
c. protons are negatively charged, electrons are neutral, and neutrons are negatively charged
d. protons are negatively charged, electrons are positively charged, and neutrons are neutral
e. protons are neutral, electrons are negatively charged, and neutrons are positively charged
____ 13. An atom has 6 protons, 8 neutrons, and 6 electrons. Its atomic mass is:
a. 2
b. 6
c. 8
d. 14
e. 20
____ 14. The atomic number of an atom reveals the number of:
a. electrons in the atomic nucleus
b. protons in the atomic nucleus
c. protons plus neutrons
d. protons plus electrons
e. neutrons plus electrons
____ 15. The subatomic particles that are responsible for the chemical behavior of atoms are the:
a. protons
b. neutrons
c. electrons
d. isotopes
e. ions
True/False
Indicate whether the statement is true or false.
____ 16. Inactive or stored energy is called kinetic energy.
____ 17. Stored energy is called potential energy.
____ 18. Atoms are the smallest particles of a compound that still retain the properties of that compound.
____ 19. Calcium is one of the major elements composing the human body.
Matching
Match the following:
a. neutron(s)
b. electron(s)
c. proton(s)
d. protons and neutrons
____ 20. The particle(s) located within the nucleus