atomA atomB
-17 protons 17 protons
18-neutron 20neutrons
17-electrons 17-electrons
what are the mass number and atomic number of A AND B
WHAT IS THE RELATION BETWEEN THE TWO CHEMICAL SPECIES
Which elements or element do they represent

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Solution

$A t o m A h a s 17 p r o t o n s, 18 n e u t r o n s a n d 17 e l e c t r o n s S o t h e a t o m i c n u m b e r o f A = 17 (a t o m i c n o = n o o f p r o t o n) M a s s n o = N o o f p r o t o n s + n o o f n e u t r o n s = 17 + 18 = 35 S o t h e e l e m e n t i s {}_{17}C l^{35} A t o m B h a s 17 p r o t o n s, 20 n e u t r o n s a n d 17 e l e c t r o n s S o t h e a t o m i c n u m b e r o f B = 17 (a t o m i c n o = n o o f p r o t o n) M a s s n o = N o o f p r o t o n s + n o o f n e u t r o n s = 17 + 20 = 37 S o t h e e l e m e n t i s {}_{17}C l^{37} A s t h e a t o m A a n d B h a s s a m e a t o m i c n u m b e r a n d d i f f e r e n t m a s s n u m b e r t h e y a r e c a l l e d i s o t o p e s .$

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