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Calcium, Ca, atom no. 20

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Q: What is the identity of the element that has an atomic mass of 40.078 amu?
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Which of the following determines the identity of an element atomic number mass number atomic mass or overall change?

atomic number


Which mass number or atomic number determine what element an atom is?

The identity of the element is determined solely by the atomic number, which is the number of protons.


Is there an element that has the same atomic number and atomic mass?

No, there is no naturally occurring element with the same atomic number and atomic mass. The atomic mass of an element is the weighted average of the masses of its isotopes, which have different numbers of neutrons. The atomic number of an element is the number of protons in its nucleus, which determines its identity. Therefore, the atomic number and atomic mass are different for each element.


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.


What is the atomic mass for magnesiam?

Magnesium is a meta element. Atomic mass of it is 24.


Which element has the atomic mass of 126.9045?

The element is Iodine (I). It has an atomic mass of about 126.9.


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

Atomic mass is the mass of 1 mole of the element. Atomic number is the number of protons the element has


Which is the average of the mass numbers of an element's isotopes?

the Atomic Mass


What is the atomic mass of a nickel?

Nickel is a meta element. Atomic mass of it is 59.


What is the atomic mass of Antimony?

Antimony is a meta element. Atomic mass of it is 122.


What is the atomic mass of the element flourin?

Fluorine is a meta element. Atomic mass of it is 19.


What is the atomic mass of this element Au?

Gold is a meta element. Atomic mass of it is 197.