Question

Write and Learn name and symbol of 20 useful element and 10 useful​

Answer 1

Answer:

19)K- Potassium

20)Ca- calcium

Explanation:

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Answer 2

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${\bold{\underline{\underline{ Elements \: with\: Symbols\: :}}}}$

$\large\begin{tabular}{c | i} Elements & Symbols \\ \cline{1-2} Hydrogen& H2 \\Helium & He\\Lithium & Li\\ Berilyum & Be \\Boron & B\\Carbon & C\\Nitrogen & N2\\ Oxygem &O2\\ Fluorine & F\\ Chlorine & Cl \\ Neon & Ne\\ Sodium & Na\\ Magnesium & Mg\\ Aluminum & Al\\ Silicon & Si\\ Phosphorus & P\\ Sulphur & S\\ Argon & Ar\\ Copper & Cu\\ Mercury & Hg\end{tabular}$

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