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Atomic numbers are determined by the number of protons an atom has. The mass number is determined by the number of protons and neutrons. While the number of protons can't change (as the element itself would change), neutrons can and do vary. These are called isotopes.

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Q: Why does Calcium have different mass numbers but same atomic number?
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Related questions

What is atomic number for calcium?

The atomic number of calcium is 20.


What is the range of atomic number of calcium?

The atomic number of calcium is 20.


What is atomic no of calcium?

The atomic number of Calcium is 20.


Calcium's atomic number?

Calcium is a metal element. atomic number of it is 20.


How many neutrons calcium?

The number of neutrons is the difference between the Atomic Mass of an isotope and the atomic number of the element; each isotope of calcium has a different number of neutrons. See the link below for calcium isotopes.


Why atomic number of different elements are different?

Because different elements have different numbers of protons, which determines the atomic number.


What is atomic number of calcium?

Calcium is a meta element. Atomic number of it is 20.


What atomic number of F plus the atomic number of Na equals the atomic number of this element?

Calcium


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

The different mass numbers are due to different numbers of neutrons.


Form of an element having different atomic and number of neutrons?

Isotopes have different numbers of electrons, but not different atomic numbers (numbers of protons) or they'd be different elements.


What is the atomic number for calcium?

The most common calcium isotope, calcium-40, has 20 neutrons.


What is the electron number of calcium-40?

The element Calcium (Ca) has 20 electrons according to its atomic number which is 20.