periodic table of first 20 elements

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Terms	Definitions
Hydrogen	Atomic Number: 1 Symbol: H Atomic Mass: 1 Protons: 1 Neutrons: 0 Electrons: 1
Helium	Atomic Number: 2 Symbol: He Atomic Mass: 4 Protons: 2 Neutrons: 2 Electrons: 2
Lithium	Atomic Number: 3 Symbol: Li Atomic Mass: 7 Protons: 3 Neutrons: 4 Electrons: 3
Beryllium	Atomic Number: 4 Symbol: Be Atomic Mass: 9 Protons: 4 Neutrons: 5 Electrons: 4
Boron	Atomic Number: 5 Symbol: B Atomic Mass: 11 Protons: 5 Neutrons: 6 Electrons: 5
Carbon	Atomic Number: 6 Symbol: C Atomic Mass: 12 Protons: 6 Neutrons: 6 Electrons: 6
Nitrogen	Atomic Number: 7 Symbol: N Atomic Mass: 14 Protons: 7 Neutrons:7 Electrons: 7
Oxygen	Atomic Number: 8 Symbol: O Atomic Mass: 16 Protons: 8 Neutrons: 8 Electrons: 8
Fluorine	Atomic Number: 9 Symbol: F Atomic Mass: 19 Protons: 9 Neutrons: 10 Electrons: 9
Neon	Atomic Number: 10 Symbol: Ne Atomic Mass: 20 Protons: 10 Neutrons: 10 Electrons: 10
Sodium	Atomic Number: 11 Symbol: Na Atomic Mass: 23 Protons: 11 Neutrons: 12 Electrons: 11
Magnesium	Atomic Number: 12 Symbol: Mg Atomic Mass: 24 Protons: 12 Neutrons: 12 Electrons: 12
Aluminum	Atomic Number: 13 Symbol: Al Atomic Mass: 27 Protons: 13 Neutrons: 14 Electrons: 13
Silicon	Atomic Number: 14 Symbol: Si Atomic Mass: 28 Protons: 14 Neutrons: 14 Electrons: 14
Phosphorus	Atomic Number: 15 Symbol: P Atomic Mass: 31 Protons: 15 Neutrons: 16 Electrons: 15
Sulfur	Atomic Number: 16 Symbol: S Atomic Mass: 32 Protons: 16 Neutrons: 16 Electrons: 16
Chlorine	Atomic Number: 17 Symbol: Cl Atomic Mass: 35 Protons: 17 Neutrons: 18 Electrons: 17
Argon	Atomic Number: 18 Symbol: Ar Atomic Mass: 40 Protons: 18 Neutrons: 22 Electrons: 18
Potassium	Atomic Number: 19 Symbol: K Atomic Mass: 39 Protons: 19 Neutrons: 20 Electrons: 19
Calcium	Atomic Number: 20 Symbol: Ca Atomic Mass: 40 Protons: 20 Neutrons: 20 Electrons: 20

periodic table of first 20 elements

Terms

Definitions