Calcium Quiz: questions and answers
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1. What is the chemical symbol of calcium?
Ca
2. What is the atomic number of calcium?
20
3. What is the Latin name of "calcium"?
Calx
4. When was pure calcium isolated via electrolysis for the first time?
1808
5. Who discovered the calcium?
Humphry Davy
6. How many atoms are there in a calcium?
Twenty electrons
7. How many stable isotopes are there in natural calcium?
5
8. How many valence electrons does calcium have?
2
9. What is the melting temperature of calcium metal?
842 °C
10. What is calcium good for in the human body?
Bones