25-04-2020
Chemistry

contestada

the atomic number of Re is 75. The atomic mass of one of its isotopes is 186. How many neutrons are in an atom of this isotope?
A. 75
B.111
C. 186
D. 261

Respuesta :

SvetkaChem SvetkaChem

25-04-2020

Answer:

B.111

Explanation:

Atomic mass = number of protons(or atomic number) + number of neutrons

186 = 75 + number of neutrons

number of neutrons = 186 -75 = 111

Answer Link

muffordk768 muffordk768

13-11-2020

Answer:111

Explanation:

Answer Link

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