Mark the following statements as true or false. If a statement is false, correct it to make a true statement.


d. Every element has a characteristic number of protons, which is called the element's mass number.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. The mass number of an atom is the sum of its neutrons and protons.

Match the following terms with the correct definition:

_____Endergonic reaction a. Energy in motion

_____Potential energy b. Energy stored in chemical bonds

_____Electrical energy c. Reaction that consumes energy

_____Anabolic reaction d. A decomposition reaction

_____Oxidation-reduction reaction e. The energy of moving charged particles

_____Chemical energy f. Stored energy     

_____Catabolic reaction g. Synthesis reaction     

_____Kinetic energy h. Reaction where electrons are transferred between reactants

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. Protons and neutrons have a positive charge and electrons have a negative charge.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. Valence electrons are the electrons in the outermost shell of an atom.

A proton ___________:

a) Has one positive charge.

b) Has one AMU.

c) Is found in the nucleus of the atom.

d) Only a and b are true.

e) a, b, and c are true.

The average oxygen atom has a mass number of 16 and an atomic number of 8. This means that the number of neutrons in this oxygen atom is:

a) 24.

b) 8.

c) 16.

d) 4.

e) 2.

How many valence electrons does an atom with five total electrons have?

a) 5.

b) 7.

c) 3.

d) 2.

e) 1.

Which of the following is true about electron energy shells?

a) They represent regions around the nucleus in which the electrons orbit.

b) The shells closest to the nucleus contain electrons with higher energy.

c) They contain electrons of the same energy.

d) a and b only.

e) a and c only.