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Question

Question
Please observe this element, Calcium, from a periodic table of the elements. 20 Ca 40.08 Based on this entry, how many protons does calcium contain in its atoms? none 20 40

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Stanley

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Answer

20

Explanation

The question asks for the number of protons in a calcium atom. The number of protons in an atom is equal to its atomic number. The atomic number of calcium is 20, which means it has 20 protons. The number 40.08 represents the atomic mass of calcium, which is the sum of the protons and neutrons in the atom. However, the question specifically asks for the number of protons, not the atomic mass. Therefore, the correct answer is 20 protons.

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