Number of protons, neutrons and electrons in the element ₈₉X²³¹ is:
A) 89, 231, 89
B) 89, 89, 242
C) 89, 142, 89
D) 89, 71, 89
Answers
Answered by
9
Atomic No. Z = 89
Atomic Mass No. A= 231
Number of electrons= 89
Number of Protons= 89
Number of Neutrons = A-Z= 231-89= 142
So, the answer is 3) 89, 142, 89
Atomic Mass No. A= 231
Number of electrons= 89
Number of Protons= 89
Number of Neutrons = A-Z= 231-89= 142
So, the answer is 3) 89, 142, 89
Answered by
15
atomic number is 89
so, proton = 89
electron = 89
for neutron N = 231-89 = 142
ans is C
so, proton = 89
electron = 89
for neutron N = 231-89 = 142
ans is C
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