Post a New Question

US History

posted by on .

41. A neutron atom of potassium has an atomic number of 19 and an atomic mass number of 39. Find its number of protons, neutrons, and electrons.

This is what I got-
Protons: 19
Neutrons: 20
Electrons: ?


  • Chemistry - ,

    **Not US History, haha


  • electrons - ,

    The electrons must be the same as the protons, or, Lord help us, each atom would be repulsively charged.

  • Chemistry - ,

    So..19, right?


  • US History - ,

    yes, 19

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question