Answered

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What is the number of protons of an element with a mass number of 100 and a
neutron number of 40?
A.100
B.40
C.0
D.60

Sagot :

ROYADE

Answer:

D-60

Explanation:

Mass number =Proton number(P) + Neutron number

100=P+40

collect like terms

P=100-40

P=60

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