Question

what is meant by the following i.atomic number of calcium is 20​

Answer 1

Answer:

Explanation: Isotopes are named for their mass numbers, for example, carbon-14. ... The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons

Explanation:

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Answer 2

Answer:

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