which of these is the atomic number of calcium (ca)? 40.078 20 ca
which of these is the atomic number of calcium (ca)? 40.078 20 ca
Answer
Brief Explanations:
The atomic number is the number of protons in an atom's nucleus. Calcium has 20 protons, so its atomic number is 20. 40.078 is calcium's atomic - mass, and 'Ca' is its chemical symbol.
Answer:
20