13trinitymoon 13trinitymoon

09-09-2021
Chemistry

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These are the first 20 elements on the periodic table which of these elements had 20 protons in its nucleus (atomic number = 12)?

1. He

2. S

3. Mg

4. C

These are the first 20 elements on the periodic table which of these elements had 20 protons in its nucleus atomic number 12 1 He 2 S 3 Mg 4 C class=

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gaverell005 gaverell005

09-09-2021

Calcium has 20 protons in the nucleus
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