Atoms Quiz

What is the smallest unit of an element that retains the chemical properties of that element?

• compound

• atom

• ion

• molecule

What are the three subatomic particles that make up an atom?

• protons, neutrons, and positrons

• electrons, photons, and neutrinos

• protons, electrons, and quarks

• protons, neutrons, and electrons

What is the charge of a proton?

• 0

• -1

• +1

• +2

What is the charge of an electron?

• 1.6 x 10^-19 coulombs

• -1.6 x 10^-19 coulombs

• 0 coulombs

• 1.6 x 10^19 coulombs

What is the charge of a neutron?

• 0

• -1

• 2

• 1

What is the atomic number of an element?

• The atomic number of an element is the number of electrons in the nucleus of an atom.

• The atomic number of an element is the number of neutrons in the nucleus of an atom.

• The atomic number of an element is the number of protons in the nucleus of an atom.

• The atomic number of an element is the number of protons and neutrons in the nucleus of an atom.

What is the atomic mass of an element?

• The atomic mass of an element is the average mass of the atoms in a sample of that element.

• The atomic mass of an element is the sum of the masses of all the isotopes of that element.

• The atomic mass of an element is the number of electrons in the outermost energy level of an atom.

• The atomic mass of an element is the total number of protons and neutrons in the nucleus of an atom.

What is the symbol for the element with atomic number 1?

• He

• O

• H

• C

What is the symbol for the element with atomic number 8?

• O

• H

• C

• N

What is the symbol for the element with atomic number 20?

• Ca

• Mg

• Fe

• Na