# Question: Why does potassium 40 have a different mass number for potassium 39?

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All these isotopes have the same number of protons; sothe number of neutrons in potassium- 39 is one less than in potassium- 40 and two less than in potassium- 41. The mass number of an atom is the sum of the number of protons and neutrons in an atom. Isotopes have different mass numbers but the same atomic number.

## What is the difference between potassium-39 and potassium 41?

Since K is atomic number 19, it has 19 protons. It would need 20 neutrons to get to K 39. So K 41 has 19 protons and 22 protons. The difference between each of those isotopes is 2 neutrons.

## What is the mass number of potassium-39?

38.96370649 Properties of Potassium-39 Isotope:Properties of Potassium-39 Isotope:POTASSIUM-39Relative Isotopic Mass38.96370649Neutron Number (N)20Atomic Number (Z)19Mass Number (A)3925 more rows

## How many neutrons do K potassium-39 and potassium-40 have?

2: How many neutrons do (K) potassium-39 and potassium-40 have, respectively? Potassium-39 has twenty neutrons. Potassium-40 has twenty one neutrons.

## What is the average atomic mass of potassium-39 40 and 41?

PotassiumIsotopeAtomic mass (Da)Isotopic abundance (amount fraction)39K38.963 706 49(3)0.932 581(44)40K39.963 9982(4)0.000 117(1)41K40.961 825 26(3)0.067 302(44)

## What is the atomic mass for potassium?

39.0983 u Potassium/Atomic mass

## Is potassium a soft metal?

Potassium is a soft, silvery metal that reacts extremely vigorously with water, and tarnishes rapidly in air. Its name is derived from the English word potash, for potassium carbonate, a compound found in high concentrations in wood ashes. The symbol K is derived from the Latin name for the element, kalium.

## Which statement is true about potassium-39 and potassium-40?

Explanation of Solution They have mass of 1 and together with protonscomprising the mass of the atom. Potassium-39 and potassium-40 are isotopes of each other. Isotopes of the same element have same atomic number but different atomic masses. That is, they have different number of neutrons but same number of protons.

## What is the average atomic mass for potassium?

39.0983 u Potassium/Atomic mass

## What is the mass number of potassium-39 What is the isotopes charge?

The charge of potassium-39 is zero. Potassium-39 has 19 protons.

## Is potassium 41 stable?

Potassium 41 Chloride (Potassium-41) is a stable (non-radioactive) isotope of Potassium. It is both naturally occurring and produced by fission. Potassium 41 Chloride is one of over 250 stable isotopes produced by American Elements for biological and biomedical labeling, as target materials and other applications.

## What is potassium 41 used for?

Potassium-41 Isotope Applications: Potassium-41 isotope is used for Potassium-42 (K-42 isotope, 42K isotope) radionuclide (radioisotope) production (can be used in life science for healthcare and medical applications and pharmaceuticals industries);

## What does the symbol 39 19 K mean?

It is the number under the element symbol. For potassium it is about 39. This means that the atomic weight is 39 for both protons and neutrons. Since we know that the number of protons is 19 we can calculate the number of neutrons (39 19) as 20.

## What is the highest energy level of potassium?

fourth energy level Potassium, K , is located in period 4, group 1 of the periodic table, which means that it has one electron on its highest energy level. The size of a potassium atom is determined by how far that solitary electron that resides on the highest energy level, i.e on the fourth energy level, is from the nucleus.

## Why is potassium a very reactive metal?

- Potassium metal has more number of shells compared to sodium and thus it becomes easy to remove one electron from its outermost orbital ( less ionization enthalpy). - So, out of given metals, Potassium is the most reactive metal. Therefore, potassium is the most reactive metal among the given options.