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OpenStudy (anonymous):
Element A has 15 protons. Determine the number of neutrons in its isotope with mass number 33. A) 15 B) 18 C) 33 D) 48
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OpenStudy (abhisar):
Hey there! Welcome to OpenStudy :) Mass number is equal to number of protons + number of neutrons. Let the number of neutrons in the given isotope be equal to A. Then, A+15=33 Now from the above equation find the value of A.
OpenStudy (anonymous):
I Agree its A
OpenStudy (anonymous):
no solve the equation A+15=33 ---> A=33-15=18
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