Answers

2016-04-09T22:18:02+05:30
The First 30 Elements:
Element-Symbol-Atomic number-Atomic mass-Valency
Hydrogen-H(symbol)-1(Atomic number)-1(Atomic mass)-1(Valency)
Helium-He-2-4-0
Lithium-Li-3-7-1
Beryllium-Be4-9-2
Boron-B-5-11-3
Carbon-C-6-12-4
Nitrogen-N-7-14-3
Oxygen-O-8-16-2
Fluorine-F-9-19-1
Neon-Ne-10-20-0
Sodium-Na-11-23-1
Magnesium-Mg-12-24-2
Aluminum-Al-13-27-3
Silicon-Si-14-28-4
Phosphorus-P-15-31-3
Sulphur-S-16-32-2
Chlorine-Cl-17-35.5-1
Argon-Ar-18-40-0
Potassium-K-19-39-1
Calcium-Ca-20-40-2
Scandium-Sc-21-44-3
Titanium-Ti-22-48-4
Vanadium-V-23-51
Chromium-Cr-24-52
Manganese-Mn-25-55
Iron-Fe-26-56
Cobalt-Co-27-59
Nickel-Ni-28-58
Copper-Cu-29-63.5
Zinc-Zn-30-65
*Note: Valencies are variable for elements 23-30

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