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Chemistry, 12.08.2020 05:01 Elephants12

An atom X has a proton number of 19 and relative atomic mass of 39. (i) How many electrons, protons and neutrons are there in an atom of X?

(ii) How many electrons will there be in the outer energy level (shell) of an atom of X?

(iii) What is the electronic configuration of X?

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An atom X has a proton number of 19 and relative atomic mass of 39. (i) How many electrons, protons...

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