13trinitymoon
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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=

Respuesta :

gaverell005
Calcium has 20 protons in the nucleus
Pls mark brainliest

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