There are 43 number of protons and number of electrons 40
What is that element and is it atom or ion
An element with 43 protons is technetium (Tc). With 40 electrons, it would be an ion, specifically a positively charged ion since it has more protons than electrons.
To determine the element, we need to consult the periodic table. An element is identified by its atomic number, which corresponds to the number of protons in the nucleus of an atom. In this case, since there are 43 protons, the element is Technetium (Tc).
Now, to determine whether it is an atom or an ion, we compare the number of protons with the number of electrons. If they are equal, it is an atom. However, in this case, there are 40 electrons, which is three less than the number of protons. Thus, Technetium with 40 electrons is an ion.