Answer:
im pretty sure its b
Explanation:
im sorry if im wrong i tried my best
Number of proton K=19
so, 42 - 19 =23
then the answer in 19 protons and 23 neutrons
Well, an independent variable ids the thing that stays the same and a dependent variable is the thing that changes.
Ionization energy is the energy required to remove an electron from a gaseous atom or ion. The first or initial ionization energy or Ei of an atom or molecule is the energy required to remove one mole of electrons from one mole of isolated gaseous atoms or ions
