Question

An atom of the most common isotope of neutral potassium has a nucleus composed of 19 what

Answer 1

If you were to look at a periodic table, you'd see that potassium (K) has an atomic number of 19, which is how many protons it has. Also because it's neutral, the number of protons = the number of electrons, but only protons and neutrons are inside the nucleus.

So the answer would be that the nucleus is composed of 19 protons.

Answer 2

19 protons.

Step-by-step explanation:

Isotopes are atoms of the same chemical element that have the same amount of protons (same atomic number), but differ in mass number (A = protons + neutrons). Thus, potassium isotopes will all have the same number of protons.

Potassium is a chemical element that is extremely important for our body especially in the maintenance of cells. It has an atomic number 19, mass number 39.10 u.a and a symbol K.

The atom number corresponds to the number of protons of an atom. For this reason, we can say that the most common potassium isotope will have the number of protons equal to 19.