why do diferent atoms of the same element always have the same atomic number but can have diferent mass number

Question

what are these different atoms called?

Answer 1

Isotopes. All atoms of an element must have the same number of element-identifying protons, but the number of neutrons can vary.

Answer 2

Yes. Those with different atomic mass have different numbers of neutrons & are called isotopes. To be the same element they must have the same number of protons. The atomic mass is aprox the number of protons plus the number of neutrons.

example carbon has 6 protons. most has 6 neutrons for an atomic mass of 12. some have 7 or 8 neutrons for atomic masses of 13 & 14.

Answer 3

The identity of an element is determined by the number of protons it has....its atomic number. However, atoms that have the same number of protons can have different numbers of neutrons. This results in different mass numbers (the sum of protons and neutrons).

Atoms that have the same atomic number but different mass numbers are called isotopes.

Answer 4

The atomic number is the number of protons in the atom (which also determines what kind of atom it is). The change of mass is due to a different number of neutrons. These atoms are called isotopes.

Answer 5

Atomic Number is the number of protons in the nucleus. Atomic weight includes protons AND neutrons, and the number of neutrons may vary. These are called ISOTOPES of an element.

Answer 6

You can look this up in your textbook.

Atoms of the same element can have different numbers of neutrons. Neutrons add to the atomic weight of an element, but they do not change the charge. These are called isotopes.

Answer 7

Atoms in an ingredient? needless to say they do. and that i think of you're bearing on isotopes of an ingredient. Atomic sort is the quantity of protons and electrons in an ingredient. The sort of neutrons can replace, yet to not the component to volume so as that it quite is fairly risky. If an isotope of an ingredient does not have the comparable atomic sort of that ingredient, then it quite is not the ingredient is it? Ex: Carbon's atomic sort is 6. It has 6 protons in all of its isotopes. If it had 7, it could be an entire new ingredient, nitrogen. If it had 5, it may well be boron. Get the element? :)

Answer 8

This can happen because any given element may have different isotopes. Isotopes of a given element all have the same number of protons & electrons (hence they all have the same atomic number), but they have different numbers of neutrons. Isotopes of a given element all have the same chemical properties, but they will have different mass numbers.