Atoms and Periodic Table Review

A(n) ______ is matter that is composed of one type of atom.

• a. compound

• b. mixture

• c. element

• d. molecule

The smallest piece of an element that still retains (keeps) the properties of the element is a(n) ______.

• a. atom

• b. compound

• c. plasma

• d. molecule

The atomic number of an element can be used to identify an element.

• a. true

• b. false, mass number

• c. false, average atomic mass

The nucleus of an atom is ______ charged.

• a. positively

• b. variably

• c. negatively

• d. none of these

Neutrons have ______ charge.

• a. positive

• b. negative

• c. variable

• d. no or neutral

Electrons have ______ charge.

• a. positive

• b. negative

• c. variable

• d. no or neutral

Protons have ______ charge.

• a. positive

• b. negative

• c. variable

• d. no or neutral

Each energy level of an atom has a maximum number of ______ it can hold.

• a. neutrons

• b. quarks

• c. protons

• d. electrons

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is ______.

• a. 26

• b. 30

• c. 52

• d. 56

Most of the mass of an atom is found in its ______.

• a. nucleus

• b. electron cloud

• c. atomic number

• d. mass number