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Biology, 18.07.2019 05:20 hellodarkness14

An atom of an element x may be written as 9 4x
a) what does the number 9 indicate ?
what does the number 4 indicate ?
what is the number of protons in atom x?
d) what is the number of neutrons in atom x?
what is the number of electrons in atom x
how many electrons are there in the outermost shell

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An atom of an element x may be written as 9 4x
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