Question

How many more neutrons would be in an isotope of sulfur-31 than a normal sulfur atom?
A. +1
B. +16
C. +15
D. -1

Answer 1

Answer:

"Isotopes are atoms of same element which have same number of protons but different number of neutrons."

According to the periodic table, Sulfur has the atomic number as 16.

In the neutral state,

the number of protons in Sulfur = atomic number

= 16

number of electrons = number of protons

number of electrons = 16

Atomic mass = number of protons + number of neutrons

number of neutrons = atomic mass - number of protons

= 31 - 16

= 15

Answer 2

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