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?

(i)electrons = 19; Protons = 19 Neutrons =39-19=20

(ii) 1

(iii) 2,8,8,1

Hope this helps.

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since electrons are negative the answer is neagtaive

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

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