Question

All elements in periodic table with their atomic masses ,atomic number,valancy,

Answer 1

you can find valency easily by the atomic number. supposingly you have an element  calcium  its electronic configuration is 2,8,8,2 in the last shell the number of electrons is 2 so it will give 2 electrons and its valency would be +2.now lets take chlorine its electronic configuration is 2,8,7 it cannot give 7 electrons so it will take 1 electron and complete its outermost shell so its valency is -1. hope you can find the valencies of the elements.

Answer 2

Answer:

have a nice day hope it's helpful

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