Do isotopes of the same element have different atomic numbers?

Answer 1

NO. An element always has its own unique atomic number, because the atoms of that element all have identical amounts of protons. Counting the number of protons in a nucleus of an atom reveals the identity of the atom. So, all atoms of the same element have the same atomic number.

However atoms of one element CAN have a different masscaused by different number of neutrons in nucleus: these are called isotopes of that element.
No. The only thing that can change within an given element, is the Atomic Mass usually referred to as isotopes, which means there is a different abundance of each isotope.

For example chlorine has two isotopes one which is 75.78% and a atomic mass of 34.969 and the second is 24.22% and a atomic mass of 36.966.

Now calculate the average atomic mass and you have a answer of 35.45.

Answer 2

yes, they do. the atomic number is at the upper left or right hand corner of the element on the Periodic Table the atomic number is the number of protons in an element, and each element has a different number of protons. that is how they are arranged.

Answer 3

Yes. They have the same number of Protons, meaning they are the same element, but have different numbers of Neutrons, so have different atomic masses. These are called isotopes of that element.

Answer 4

No, isotopes of the same element have the same atomic number. Isotopes are atoms of the same element that have the same number of protons (and therefore the same atomic number), but different numbers of neutrons.

Answer 5

Yes they are called isotopes they have the same number of protons and electrons but different number of neutrons which makes them unstable in some cases.

Answer 6

no

Answer 7

Yes.