Question

3. If there is an atomic mass of 47

and the atomic number is 20,
how
many protons and neutrons
are there?

Answer 1

20

27

Step-by-step explanation:

Given parameters:

Atomic mass = 47

Atomic number = 20

Unknown:

Number of protons = ?

Number of neutrons = ?

Solution:

To solve this problem,

Atomic mass = number of protons + number of neutrons

Atomic number = number of protons

So;

Number of protons = 20

Now;

Number of neutrons = Atomic mass - number of protons

Number of neutrons = 47 - 20 = 27