first 20 elements and their symbols and atomic number
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Explanation:
Atomic Number Element Symbol
17 Chlorine Cl
18 Argon Ar
19 Potassium. K
20 Calcium. Ca
Answered by
1
Answer:
Hydrogen has H symbol
Helium has He
lithium has li
Berryllium has Be
Boron has B
Carbon has C
Nitrogen has N
Oxygen has O
Fluorine has F
Neon has Ne
Sodium has Na
Magnesium has Mg
Aluminum has Al
Silicon has Si
phosphorus has p
Sulphur has S
Chlorine has Cl
Argon has Ar
Potassium has K
Calcium has Ca
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