A. 0.8
B. 0.5
C. 0.2
D. 0.1

Correct Answer:

Option C = 0.2

Explanation

0.25×10³/1.25×10³ = 0.2

SEE ALSO  The nucleon number and the proton number of a neutral atom of an element are 238 and 92 respectively. What is the number of neutrons in the atom?

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