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Atomic Number and Mass Number

The atomic we...

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The atomic weight of calcium is

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Solution

Definition of Calcium
Calcium is an element with atomic number 20 and mass number 40. The mass number can also be called atomic weight.
Mass number or atomic number is the sum of total protons and neutrons residing inside the atom.
Calcium has 20 protons and 20 neutrons in it (also 20 electrons).
It is an alkaline earth metal.
It is solid at room temperature.
The atomic weight of calcium is 40 a.m.u

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