Atomic mass, mass number, atomic number, isotope, valence electrons, atomic charge, Bohr Model, Lewis Dot Model, electron, energy level, Family/Group, Row/Period

Negatively charged particles that surround the nucleus of the atom.

Equals the number of protons + neutrons in the atomic nucleus

Equals the number of protons (p+) in the nucleus

Each element has its own number of p+

C6 N7 O8 F9

These are located around the nucleus and are home to electrons.

An atom’s outer electrons

This model of the atom only shows the outer electrons

Is the average mass of all of the isotopes for a particular element

Is shown as a decimal

This model shows an atom’s protons, neutrons and electrons.

This number is positive if an atom loses electrons and negative if an atom gains electrons.

These are located horizontally in the PT

These are vertical columns in the PT

Different forms of the same element with the same # of p+ but different #s of no

Ex.