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Answer :

Answer:

the no.of protons in k is 19 and no.of neutrons is 20.

THE NUMBER OF PROTONS IN AL IS 13 AND NO.OF NEUTRONS IS 14

THE NUMBER OF PROTONS IN BORON IS 5 AND NO.OF PROTONS IS 6

THE NUMBER OF PROTONS IN LI IS 3 AND NO.OF NEUTRONS IS 4