Question

atomic mass of potassium is 39 explain​

Answer 1

it is by seeing the periodic table which is created by mendeleev

Answer 2

Answer:

the atomic number of potassium is 19 . But potassium can have atomic masses of 39 , 40 and 41 . potassium 39 potassium 40 and potassium 41 are all different isotypes of the element potassium.Each isotype has 19 protons and 19 electrons. but the number of neutrons vary.