These are the reactive elements located in Group 2 of the periodic table that have a +2 oxidation number.

On the periodic table, this vocabulary term is the number of protons and electrons in an atom.

A link between two atoms.

Area outside of the nucleus where you'll most likely find electrons in an atom.

This is a column on the periodic table of elements.

Term that refers to a charged atom.

Atoms of the same element that have the same number of protons, but with varying number of neutrons.

This is the ROUNDED number that lets us know an estimate of protons and neutrons that are in the nucleus of atoms.

These elements are located on the staircase, and have properties of both metals and nonmetals.

Elements that are found to the LEFT of the staircase and are good conductors of heat and electricity.

This is a subatomic particle with no charge and a relative mass of 1 amu.

With an oxidation number of 0, this is an element with a full valence shell, and is inert or very nonreactive.

These are elements found to the RIGHT of the staircase and are very good insulators.

The center of all atoms that contain the protons and neutrons in an atom.

A ROW of elements in the periodic table.

This is a subatomic particle with a positive charge and a mass of 1 amu.

Electrons that are located on the last or outer orbital shell of atoms.

The number of electrons an atom gains or loses when forming bonds so they can be stable. It can be positive, negative or zero.

Letter or letters that represent an element found on the periodic table. There are no two that are alike.

The decimal number found below the name of an element. It is the average atomic mass units for all isotopes of an element.

Credited with originating the term "atom".

Using dots to show how many valence electrons are in the outer orbital shell of atoms.

Also called the planetary model, it gives us a visual of the electrons around the nucleus; similar to the planets orbiting the sun.

This is the basic building block of chemistry and all matter.

Family name of all the cations in Groups 3 - 12.

Family name of the elements that have a -1 oxidation number in Group 17.

Family name of the group that has a

-3 oxidation number.

This group/family on the periodic table has 4 valence electrons in their last orbital shell.

This is what happens when the number of PROTONS in an atom is changed. (Remember our flowchart?)