Elements
Harder Elements
Terms A
Terms B
Parts of an Atom
100

O

Oxygen 

100

Al

Aluminum

100

Atom

The basic unit of a chemical element

100

Atomic Number

The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table

100

Nucleus

Small dense central core of an atom

200

He

Helium

200
K

Potassium

200

Physical Property - 3 examples

Options: Color, hardness, conductivity, melting/boiling, etc

200

Chemical Property - 3 examples

Options: reactivity, rusting, ability to burn, etc

200

Protons 

positively changes substances particles  
300
Mg

Magnesium

300

Zn

Zinc

300

Atomic Mass

The average mass of one atom of an element; protons + neutrons

300

Compound

A mixture composed of two or more separate atoms

300

Electron

Negatively charged subatomic particles

400

Li

Lithium

400

Ba

Barium

400

Electron Configuration

the distribution of electrons in an atom or molecule

400

Radioactive Decay

The process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive

400

Neutron

Neutral subatomic particles found in the nucleus

500

Na

Sodium

500

V

Vanadium

500

Isotope

A variation of an element that possesses the same atomic number but a different mass number

500

Cations/Anions (Define both)

Cations: Positively charged ions

Anions: Negatively charged ions

500

Orbitals

The circles of electrons surrounding a nucleus