write the names of any 20elements their symbols and their valency.
it is my project . I know I should not take help but I need your help now please help
I will follow you I promise
Answers
ELEMENTS NAME, HYDROGEN, HELIUM, LITHIUM, BERYLLIUM, BORON, CARBON, NITROGEN, OXYGEN, FLUORINE, NEON, SODIUM, MAGNESIUM, ALUMINIUM, SILICON, PHOSPHORUS, SULPHUR, CHLORINE, ARGON, POTASSIUM AND CALCIUM. And their symbols is H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K and Ca.
Answer:
#hope it helps u
Explanation:
The first 20 elements of the periodic table have been tabulated below, along with their symbols and atomic numbers.
Element Symbol Atomic Number Valency
Hydrogen H 1 1
Helium He 2 0
Lithium Li 3 1
Beryllium Be 4 2
Boron B 5 3
Carbon C 6 4
Nitrogen N 7 3
Oxygen O 8 2
Fluorine F 9 1
Neon Ne 10 0
Sodium Na 11 1
Magnesium Mg 12 2
Aluminum Al 13 3
Silicon Si 14 4
Phosphorus P 15 3
Sulphur S 16 2
Chlorine Cl 17 1
Argon Ar 18 0
Potassium K 19 1
Calcium Ca 20 2