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(a) The atomic number of sodium is 11. What is the number of electrons in Na+?
(b) The atomic number of chlorine is 17. What is the number of electrons in Cl-?
(a) No. of electrons present in Na+= 10
(As the atomic number of sodium is 11, Na+ will have one less electron.)
(b) No. of electrons in Cl- = 18
(As the atomic number of chlorine is 17, Cl- will have one more electron.)
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