Question

PLEASE HELP ASAP!!!!!!

Answer 1

Answer:

D 17 amu

Explanation:

because all you have to do is add 9+8=17 :)

Answer 2

The mass of the nucleus is 17 amu.

Explanation

Given :

Number of Protons = 8

Number of Neutrons = 9

To Find :

Mass of the nucleus = ?

Solution :

The mass of the nucleus  Mass= p+n

Where

p= protons in the atom

n= neutrons in the atom

So,  substituting the values

Mass= 8+9

Mass= 17 amu