Atomic Structures

A particle that can’t be broken down into smaller particles

Two or more atoms chemically joined together ( can be identical atoms or different ones)

made up of only one kind of atom

Made up of at least two different atoms chemically bonded together

Made up of elements, compounds of both that are separated as the different substances are not bonded together

Has the most mass of the atom. Located in the center. Made of neutrons and protons

Protons are found in the nucleus of an atom. They have a positive charge (+1) and have the same mass as a neutron. It has a mass of 1

It is in the nucleus, has a neutral charge (0). A mass of 1

In shells around the nucleus. A negative charge ( -1) and a mass of 1/1836. Are in constant motions within their orbit

Electrons fill the shells from the nearest to the nucleus, out. Each shell has a limited number of electrons. First shell - 2 electrons. Second 8, Third 8 The more shells, the more energy

Atoms of the same number of protons but different numbers of neutrons

Vertical columns. Elements in each group have similar characteristics. Group number matches the number of electrons

Horizontal rows. The period number matches the number of shells

a positively or negatively charged particle(atom). Atoms lose or gain electrons so that they have a full outer shell