We make atomic number by number of protons in a atom. We make mass number by total of both protons and neutrons.
If they have the same atomic number but different mass, then they have a different number of neutrons, and they are called ISOTOPES.
The atomic number is the number of protons in the atom.
They are called isotopes of the same element
the answer is that it is called a atomic number.
They are called isotopes. eg we have different isotopes of carbon
Isotopes of an element have different masses but the same atomic number. Isotopes have the same number of protons and electrons but different numbers of neutrons in their nuclei.
isotopes Atoms of the same element are called Isotopes. they have the same number of atoms (i.e. same atomic number) but different number of neutrons
NO. The number of electrons in any neutral atom must be the same as the number of protons. The number of protons is the atomic number, if the atomic number is the same then the atoms are of the same element, not different ones.
Isotopes. eg U235 and U238. Both Uranium, atomic number 92, bur different isotopes.
Isotopes
Isotopes. The isotope has the same number of protons and electrons as the regular atom, but has more (or sometimes less) neutrons, and therefore its atomic mass is more (or less, depending on whether the neutrons have increased or decreased).
They are called as isotopes in which mass number differ by emmision of radiation