The Periodic Table -- Atomic Numbers 1-20

Contents:

The Periodic Table

Atomic Numbers 1-20

	1							18
1	1 H Hydrogen 1.01	2	13	14	15	16	17	2 He Helium 4.00
2	3 Li Lithium 6.94	4 Be Beryllium 9.01	5 B Boron 10.81	6 C Carbon 12.01	7 N Nitrogen 14.01	8 O Oxygen 16.00	9 F Fluorine 19.00	10 Ne Neon 20.18
3	11 Na Sodium 22.99	12 Mg Magnesium 24.31	13 Al Aluminum 26.98	14 Si Silicon 28.09	15 P Phosphorous 30.97	16 S Sulfur 32.06	17 Cl Chlorine 35.45	18 Ar Argon 39.95
4	19 K Potassium 39.10	20 Ca Calcium 40.08
	Metals			Non-metals				Noble Gases

(click on the element name to view the atomic structure)

Key

18 Ar Argon 39.95	Atomic Number
	Element Symbol
	Element Name Atomic Mass

1. The Atomic Number equals the number of protons.
2. The Atomic Mass minus the Atomic Number is equal to the number of neutrons.
3. The number of electrons is equal to the number of protons.

View the student element projects and the
Periodic Table of Lancaster High School

Other Related Links

A Periodic Table of elements at the Los Alamos National Observatory

The Periodic Table of the Elements on the Internet. Very good information here!

The Electronic Periodic Table of the Cary Academy

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