SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the atomic number of calcium (Ca)?
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2
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14
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18
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20
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Explanation:
Detailed explanation-1: -Calcium is a chemical element with symbol Ca and atomic number 20. Classified as an alkaline earth metal, Calcium is a solid at room temperature.
Detailed explanation-2: -It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40.
Detailed explanation-3: -For example, calcium (Ca) has an atomic number of 20. This means that all calcium atoms contain 20 protons. A neutral atom of calcium will also have 20 electrons.
Detailed explanation-4: -Calcium (Ca) has atomic number 20 and mass number 40 .
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