Organization
Vocabulary
What Makes an Element
Types of Elements
Misc.
100

Horizontal Rows on the periodic table.

What are Periods?

100

Originally created by Dmitri Mendeleev. Organized using periods and groups.

What is the Periodic Table?

100

The number of protons in the nucleus of the atom.

What is the Atomic Number?

100

Opaque, fusible, ductile, and has luster. Good conductors of heat and electricity.

What is a Metal?

100

The energy required to remove one mole of the most loosely held electrons from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.

What is First Ionization Energy?

200

Vertical columns on the periodic table.

What are Groups?

200

118 of these make up the periodic table.

What are Elements?

200

1/2 the distance between the nuclei of identical atoms that are bonded together.

What is Atomic Radius?

200

Has properties of metals and nonmetals.

What is a metalloid?

200

Electrons are attracted to the nucleus as they are negatively charged and the nucleus contains positively charged protons, but at the same time the layers of sub orbitals of electrons repel each other. This results in a varying attraction of the nucleus on the outer electron.


What is Nuclear Charge?

300

Metals in group 1 of the periodic table. They're the most reactive metals with 1 valence electron.

What is an Alkali Metal?

300

The ability to undergo a chemical reaction.

What is Reactivity? 

300

A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom.

What are Valence Electrons?

300

Usually gases, brittle, lack luster, and poor conductors of heat and electricity.

What is a Nonmetal?

400

Less reactive than metals in group 1, 2 valence electrons, and have low electronegativities. 

What are Alkaline Earth Metals?

400

Lacking the power to move.

What is Inert?

400

The mass of an atom of a chemical element expressed in atomic mass units (amu).

What is Atomic Mass?

400

All members of this group are nonmetals, have 7 valence electrons, and don't exist in nature as individual atoms.

What are Halogens?

500

Have multiple oxidation states, hard solids with high melting points, and less reactive than metals in groups 1 and 2.

What are Transition Metals?

500

An atom or group of atoms that carries a positive or negative electric charge as a result of losing or gaining more than one electron.

What is an Ion?

500

A concept that describes the tendency of an atom to attract a shared pair of electrons towards itself.

What is Electronegativity?

500

Group 18 and have a complete outer valence electron shell of 8 electrons.

*Except Helium

What are Noble Gases?