The hyphen notation of the most common isotope of technetium, technetium-98, is 98Tc.
40K
For example a thorium isotope is Th-231 or 23190 Th.
Examples: 4120Ca, Ca-41, calcium-41; only the first is a scientific notation.
The chemical notation is 19F.
The nuclide symbol for calcium-41 is ^41Ca. This notation indicates the element (Ca for calcium) and the mass number (41) of the isotope.
The isotope has 20 protons and 24 neutrons. This isotope is called calcium-44, and it is a stable isotope of calcium.
Argon has three naturally occurring isotopes: ^{36}{18}Ar, ^{38}{18}Ar, and ^{40}_{18}Ar.
The appropriate symbol for an isotope of potassium-39 corresponding to the isotope notation A Z X is ^39_K19.
The hyphen notation of the most common isotope of technetium, technetium-98, is 98Tc.
40K
The most common isotope of calcium (40Ca) has 20 neutrons. You can find this out by subtracting the number of protons (atomic number, 20), from the total AMU's of 40. About 96% of calcium on Earth is calcium-40. Calcium also has eight other isotopes, 41Ca through 48Ca, five of which are radioactive. The second-most prevalent stable isotope is 44Ca which is about 2% of all calcium.
An isotope of the element with 20 protons and 20 neutrons is calcium-40. Calcium has an atomic number of 20, which means it has 20 protons. The total number of protons and neutrons in calcium-40 is 40 (20 protons + 20 neutrons).
For example a thorium isotope is Th-231 or 23190 Th.
Examples: 4120Ca, Ca-41, calcium-41; only the first is a scientific notation.
The number of neutrons is the difference between the Atomic Mass of an isotope and the atomic number of the element; each isotope of calcium has a different number of neutrons. See the link below for calcium isotopes.
there are 24 stable isotopes in the element calcium.