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Isotopes

Write down th...

Question

Write down the word that will correctly complete the following sentences:
(a) Relative atomic mass of a light element up to calcium is approximately________ its atomic number.

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Solution

Relative atomic mass of lighter elements up to calcium is :

For example,

Relative atomic mass of calcium is approximately twice its atomic number. That is, calcium has 20 protons and 20 neutrons. Atomic mass is the sum of masses of protons and neutrons.

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