Question

3.An atom of an element has 15 protons and 16 neutrons.
What is the nucleon number ?

4. An atom has a proton number of 19 and a nucleon number of 39. Calculate its number of protons and neutrons in the atom


the questions in the image
please help​

Answer 1

Answer:

3. Nucleon number is 31.

4. There are 20 neutrons and 19 protons