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Answered 2008-05-07 19:21:52

An element's atomic number refers to the number of protons in its nucleus, and this number never varies - an atom with a different number of protons becomes a different element; i.e. an element with one proton is called hydrogen, an element with 2 protons is helium, 3 protons means it's lithium etc). Usually there are the same number of neutrons as there are protons, but this number can vary, and when an element doesn't have the standard number of neutrons it's called an isotope. The mass number of an element is the sum of the number of protons plusneutrons, which is why this number can is different for different isotopes.

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Isotopes of an element have the same atomic but different atomic?

Do isotopes of an element have the same atomic number but different atomic mass


How do the atomic number of the different isotopes an element compare?

The atomic number is the same for the all isotopes of a chemical element.


How are atoms different from isotopes?

Isotopes are the atoms of an element with same atomic number but different atomic masses.


Does an isotope of an element have a different atomic mass?

Yes, isotopes of an element do have different atomic mass numbers. Isotopes are different atoms of the same element with the same atomic number but different mass numbers.


Why do isotopes of an element that have different masses?

Because the number of isotopes are different the atomic masses are different.


What identifies different isotopes of an element?

the atomic number


How do different isotopes of an element differ?

Different isotopes of an element differ in the number of neutrons and thus in their atomic weight.


Two different isotopes of an element have different?

atomic weights but the same atomic number


Which isotopes of uncharged elements have different numbers?

The isotopes of the same element has the same atomic number. But the mass number (atomic mass) is different.


Why some isotopes were written without its atomic number?

Different isotopes of an element have the same atomic number, they (only) differ in (atomic) mass NUMBER.


What do two different natural isotopes of the same element have in common?

Isotopes of the same element have the same atomic number but different atomic weight. They will have the same number of protons and electrons but a different number of neutrons.


What isotopes of uncharded elements have different numbers?

The atomic number of the isotopes of an element is identical; the mass number is different.


How are isotopes the same but different?

Isotopes are different forms of the same element which have different numbers of neutrons in their atomic nuclei. A given element is identified by the number of protons in its nucleus; that's its atomic number. Two different isotopes of the same element have the same number of protons, but each has a different number of neutrons in its nucleus. Different isotopes of the same element are chemically the same.


Isotopes are atoms of elements which have...?

Isotopes are different forms of an element each having a different atomic mass number. Element isotopes have the same number of protons in the nuclei but a different number of neutrons.


Do all isotopes of an element have the same atomic number?

All isotopes of an element have the same atomic number because they have the same number of protons. However, they have a different mass because they have a different number of neutrons.


Isotopes of an element have the same atomic number but different atomic?

mass Neutrons.


Do isotopes of an element have the same atomic weight but different atomic number?

Yes.


What is the difference between atomic mass number and atomic number?

Atomic mass number is the average atomic mass for that element, which is : All the isotopes' masses known for that element averaged up. Atomic number is the element's "identity", the number of protons the element and all its isotopes have. All the isotopes of a given element will have different number of electrons and neutrons, but the protons of the element never will change.


Are isotopes the same as the atomic number?

No, an isotope is a variant of an element that has a different number of neutrons. Atomic number is the number of protons in an element.


What is a similarity and a difference between isotopes of an element?

All isotopes of an element have the same number of protons in the atomic nucleus, which is its atomic number on the periodic table. All isotopes of an element contain different numbers of neutrons in their atomic nuclei, which causes the isotopes of an element to vary in mass number (protons + neutrons).


Do isotopes of an element have different atomic masses?

Yes, isotopes have a different number of neutrons, creating a different mass.


Isotopes of elements have different what?

Isotopes of element have different mass number{proton and neutron} but the same atomic number{proton number}.


Isotopes of an element have the same atomic?

Isotopes of the same element have the same atomic number.


Do isotopes of carbon have different atomic numbers?

No: All atoms of the same element have the same atomic number, but isotopes have different mass numbers.


Idotopes of the same element have different?

if you mean isotopes then isotopes of the same element have a different number of neutrons in the nucleus so have a different atomic weight.


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