Chemistry, asked by Anonymous, 3 months ago

is it needed to learn the valencies and atomic mass for class 9 students
please ans me it is urgent​

Answers

Answered by divyanshupatwal07
1

Answer:

Atomic mass not required but you can learn atomic number with tricks upto 20. Also by 2,8,8 electronic configuration distribution you can find the valency.

Explanation:

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Answered by sonusharma45
1

no need trick hai na

outer most shell jitna hua utna hi valency uska

valency is the combine capcity of an element

atomic mass

sum of electron and proton in a element of atom

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