Understanding Elements and Atomic Structure

Elements are listed on the Periodic Table.

• True

• False

• Sometimes

• Only metals

Protons are positively charged particles found in the nucleus of an atom.

• True

• False

• Neutrons are negatively charged

• Electrons are found in the nucleus

N₂O₅ compound name

• Dinitrogen pentoxide

• Nitrogen dioxide

• Dinitrogen trioxide

• Nitrogen pentoxide

Number of Neutrons = Atomic Mass - Atomic Number

• True

• False

• It depends on the element

• Not enough information

CO compound name

• Carbon dioxide (1 carbon, 2 oxygen)

• Carbon monoxide (1 carbon, 1 oxygen)

• Cobalt oxide (1 cobalt, 1 oxygen)

• Calcium oxide (1 calcium, 1 oxygen)

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

• True

• False

• It is the number of neutrons

• It is the total number of electrons

Prefix for two atoms

• Di-

• Mono-

• Tri-

• Tetra-

The number of protons defines the element.

• True

• False

• It depends on the number of neutrons.

• It is determined by the atomic mass.

Atomic Number = Number of Protons

• Atomic Mass = Number of Protons + Number of Neutrons

• Atomic Mass = Number of Protons - Number of Neutrons

• Atomic Number = Number of Neutrons

• Atomic Mass = Number of Protons x Number of Neutrons

Prefix for five atoms

• Penta-

• Tetra-

• Hexa-

• Quadra-