Periodic Table & Atoms

Horizontal rows on the periodic table

• groups

• families

• periods

• halogens

Which group makes up most of the periodic table (they are shiny, malleable, ductile, and good conductors)

• metals

• noble gases

• metalloids

• nonmetals

noble gases in group 18 are

• reactive

• the least dense

• conductive

• nonreactive

The atomic number is equal to the number of _______ in the atom.

• neutrons

• protons

• electrons

• nucleuses

The total number of protons and neutrons makes up the ________ of an atom.

• atomic number

• atomic mass

• atomic reactivity

Electrons have a _______ charge in the atom.

• negative

• positive

• neutral

The position of the elements is dictated by the number of protons

• true

• false

The vertical columns called groups are organized by their

• physical properties

• chemical properties

• atomic number

• atomic mass

A neutron has a negative charge

• true

• false

Which two subatomic particles are found inside the nucleus of the atom?

• protons

• electrons

• ions

• neutrons