How many protons neutrons and electrons are in technetium-99?

Answer 1

Technetium has 43 protons, 43 electrons (in the neutral atom), and a differing number of neutrons depending on which isotope of the element is being considered. There are no stable isotopes of technetium, and it's discovery was a long time coming, though it had been predicted to exist by none other than Mendeleev himself.

The longest lived isotopes (many thousand years half-lives) have 54, 55, and 56 neutrons, and isotopes have been recorded with from 42 to 75 neutrons. Other than the three isotopes mentioned, the isotopes of technetium have half-lives measured in days to seconds to small fractions of a second. Outside 97Tc, 98Tc and 99Tc, none of the atoms of this synthetic transition metal hang around long.

Answer 2

There are 43 protons in a neutral atom of technetium.

Answer 3

Technetium-99 has 43 protons and electrons and 56 neutrons.

Answer 4

Technetium has 43 protons. For each isotope the number of neutrons is different. Number of neutrons = Mass number of an Tc isotope - 43

Answer 5

Technetium has 43 protons and 43 electrons. For each isotope the number of neutrons is different. Number of neutrons = Mass number of an Tc isotope - 43

Answer 6

Technetium has 43 protons and 43 electrons. For each isotope the number of neutrons is different. Number of neutrons = Mass number of an Tc isotope - 43

Answer 7

For each isotope the number of neutrons is different. Number of neutrons = Mass number of an isotope of Tc – 43Technetium has 43 protons and electrons.