Heavy-water molecules have a mass number of A) 18. B) 3. C) ...

[roselinechinyere27m]

Heavy-water molecules have a mass number of
 
  A) 18.
  B) 3.
  C) 12.
  D) 10.
  E) 20.

Question 2

If an element of atomic number 15 has an isotope of mass number 32
 
  A) the number of neutrons in the nucleus is 15.
  B) the number of neutrons in the nucleus is 17.
  C) the number of protons in the nucleus is 17.
  D) the number of nucleons in the nucleus is 15.
  E) the number of protons in the nucleus is 32.

[briseldagonzales]

Answer to Question 1

E

Answer to Question 2

B

[roselinechinyere27m]

TYSM

[dantucker]

Thanks for the timely response, appreciate it