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Nucleus: Common Terms

for chlorine,...

Question

for chlorine, Z = 17,A = 35. give the number of protons, electrons and neutrons in chlorine and chloride ion

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Solution

${}_{17}C l^{35} - h a s a t o m i c n u m b e r a s 17 . S o t h e i r p r o t o n s = 17 . M a s s n u m b e r = n u m b e r o f p r o t o n s + n u m b e r o f n e u t r o n s = 35 . N u m b e r o f n e u t r o n s = 35 - 17 = 18 N u m b e r o f e l e c t r o n = n u m b e r o f p r o t o n = 17 . F o r c h l r o i d e i o n C l^{-}, a l l a r e s a m e e x c e p t e l e c t r o n N u m b e r o f e l e c t r o n = 17 + 1 = 18$

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(c) Give the number of protons, neutrons and electrons per atom in the two isotopes of chlorine ${}_{17}^{35}{Cl}$ and ${}_{17}^{37}{Cl}$ .

Q. (a) Give the electronic configurations of sodium and chlorine.
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