Question

1.
What is the mass number of an isotope of tin that has 66 neutrons and 50
protons?

Answer 1

The mass # would be 16

Answer 2

Answer:

$\boxed {\tt 116}$

Explanation:

To find the mass number of an isotope, add the number of neutrons and protons.

$mass \ number = neutrons + protons$

There are 66 neutrons and 50 protons in the this isotope of tin.

$mass \ number = 66+50$

Add 66 and 50.

$mass \ number = 116$

The mass number of this tin isotope is 116.