atom A has a mass number 238 and atomic number 92 and atom B has a mass number 235 and atomic number 92. how many protons, atoms A and B have? how many neutrons, atoms A and B have? are atoms A and B isotopes of the same element? how?

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Solution

$A t o m A h a s m a s s n u m b e r a s 238 a n d a t o m i c n u m b e r 92 . S o n u m b e r o f p r o t o n s = 92 . N u m b e r o f n e u t r o n s = 238 - 92 = 146 A t o m B h a s m a s s n u m b e r a s 235 a n d a t o m i c n u m b e r 92 . S o n u m b e r o f p r o t o n s = 92 . N u m b e r o f n e u t r o n s = 235 - 92 = 143 N u m b e r o f p r o t o n s o f A a n d B = 92 N u m b e r o f n e u t r o n s o f A a n d B = 146, 143 A s t h e a t o m i c n u m b e r i s s a m e, t h e y a r e i s o t o p e s .$

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