Valence electrons
Atomic Structure
Atomic Name
Atomic Number
Definitions
100

An element that has 8 valence electrons.

Any noble gas. E.g., Neon and argon

100
Subatomic particles with a negative charge
What are electrons
100
He
What is Helium
100
Has 18 protons and electrons
What is Argon
100

elements with the same number of electron shells (rows of the periodic table)

What is a period

200

Three elements that have 2 valence electrons

Any group 2 element. E.g., Helium, Beryllium, and Calcium

200

Subatomic particles with no charge

Neutrons

200
N
What is Nitrogen
200
Atomic number is 5
What is Boron
200
Protons + neutrons
What is the atomic mass
300

Three other elements that have one valence electron besides Hydrogen

Lithium, sodium, potassium, Rubidium, Cesium or Francium


300
Contains the majority of the mass in an atom
What is the nucleus
300
Mg
What is Magnesium
300
Has 20 protons
What is Calcium
300
Atomic number
number of protons
400
The family of elements that have their valence electrons completely full
What are the noble gases
400

What charge does an atomic get when it looses an electron?

A positive charge

400
Li
What is Lithium
400
Atomic # is 17
What is Chlorine
400

Elements in the same ______ have the same number of valence electrons

group

500

Three elements with six valence electrons

Any group 6 element E.g., oxygen and sulfur

500

Ionic compounds form between

A metal and a non-metal

500
Si
What is Silicon
500
Has 13 electrons
What is Aluminum
500

Elements of the same atom with a different number of neutrons

What is an isotope

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