Do all atoms of the same element have the same atomic number?

Answer 1

Yes, atomic number is the number of protons and thats how an element is defined. If you change the amount of protons thus changing the atomic number, it becomes an entirely different element.

Answer 2

Yes. The atomic number is the number of protons in the nucleus. A different number of protons means its a different element.

The mass number defines the number of protons and neutrons, and that can vary for an element. You can have a different number of neutrons in the nucleus and still have the same number of protons.
Carbon 12 has 6 protons, 6 neutrons.
Carbon 13 has 6 protons, 7 neutrons.
Carbon 14 has 6 protons, 8 neutrons.
They are all carbon (atomic number 6).

Answer 3

Yes. It is the atomic number that identifies the element. An atom with a different atomic number is a different element.

Answer 4

they will have the same number, as the atomic number is a direct representation of protons wich make up what element it is. but the only thing that may vary between element and element is atomic mass (isotopes) or number of electrons (ions)

Answer 5

yes. each element can be defined or at least put into order according to the number of protons (atomic number).

Answer 6

Exactly. What could change is the number or neutrons, then you would have an isotope. But the number of protons is always the same.

Ana

Answer 7

Yes.

Doug