P.5

protons are inside the nucleus, with a positive charge, and the mass of 1amu.

electrons are outside the nucleus, with a negative charge, and the mass of zero.

neutrons are inside the nucleus, it has the charge of zero, and the mass of 1amu.

metalloids are the elements next to the stair case in the periodic table except for aluminum, its a metal..

alkali metals are the elements in group 1a found in the periodic table.

the periodic table is a scientific table that contains all the chemical elements on earth.

groups or families are the vertical columns in the periodic table.

periods are the horizontal lines in the periodic table.

subatomic particles are the three main particles that make up an atom.