Atoms and Periodic Table

The term used for the electrons in the outer energy level

Who discovered the periodic table

This group contains a nonmetal in it and is used for rocket fuel, it can also be found in stars.

Force that causes objects with opposite charges to attract one another, same charges repel one another

Region surrounding the nucleus in which the electrons move about

The weighted average of the masses of all the naturally occurring isotopes of an element

Charged particle formed when electrons and protons are not equal

The # of protons in the nucleus

This group has nonmetals, a metalloid and metal. This group also contains the element Sulfur.

This group contains elements such as Chlorine, are extremely reactive with Alkali metals and are poor conductors

This group contains metals, a non metal and metalloids. Examples include diamonds, and computer chips.

Particles of the nucleus that have no electrical charge

This group is used for fertilizer and matches. One of its elements is a major component of our atmosphere

The smallest part of an element that retains the properties of that element

This group has metals that we use for jewelry, artificial hips, & thermometers. Also contains Lanthanides and Actinides.

This group contains Sodium and Potassium and has properties such as soft, shiny metals that react violently with water

Positively charged particles in the nucleus

This force acts between all objects all the time

This group contains metals and one metalloid. Aluminum is an example of an element in this group

This group contains metals that are reactive and have a silver color; we use these elements for chalk, cement and alloys

This type of atom has the same number of protons but a different numbers of neutrons

Horizontal rows of the Periodic Table are called

This group contains all non metals; They are colorless, odorless gases and are non reactive.

Vertical columns of the Periodic Table are called

This is the force that holds protons together in the nucleus