The answer to your question is 39.0392. Try looking this stuff on Google so your don't have to wait for an answer, or you don't get a stupid answer. I once looked up what the mass of an element is and they said "The mass is alot if you got the hand full. On the other hand ..." That and you will get a more detailed answer.
If you were to lazy to read that, the answer is 39.0392.
The mass number is the sum of protons and neutrons from the nucleus of the atom.
Each isotope has a different mass number.
See the the link bellow for the potassium isotopes and calculate the mass numbers.
The most stable isotope of Potassium has the mass about 39.
Potassium is a metal element. Atomic mass of it is 30.
18
The atomic mass of potassium is 39.0893
Since potassium chloride has the formula KCl and the mass of the lost electron from neutral potassium is negligible compared with the mass of the protons and neutrons in the potassium atom nucleus, the molecular mass of potassium in this compound is the same as the atomic mass of potassium, 39.098.
potassium
Molecular mass of sulfuric acid is 98 u. Molecular mass of potassium and nitrate ions are 39 and 62 respectively. The molar mass of potassium nitrate is 101u.
The atomic number of potassium is 19.The atomic weight of potassium is 39,0983(1).The mass number of the isotope potassium-39 is 39.
The atomic mass of potassium is 39.0893
Every atom of potassium has a mass of 39 amu. Each mole of potassium has a mass of 39 grams.
The molar mass of potassium chloride is 74,5513.
The molar mass for potassium iodide is 166,0028.
Since potassium chloride has the formula KCl and the mass of the lost electron from neutral potassium is negligible compared with the mass of the protons and neutrons in the potassium atom nucleus, the molecular mass of potassium in this compound is the same as the atomic mass of potassium, 39.098.
Potassium is a metallic element. Mass number of it is 30.
The molar mass of the element potassium is 39 g/mol.
the atomic mass of potassium is approximately 39
the relative atomic mass for the element potassium is 39.0983
potassium
The atomic mass of potassium, K is 39.1. This means that 1 mole of potassium has a mass of 39.1g. Mass of 0.5mol of K = 0.5 x 39.1 = 19.6g
What is the mass, in grams, of 2 × 1012 atoms of potassium?