which of the following elements has an atomic number of 12? zinc magnesium aluminum helium
which of the following elements has an atomic number of 12? zinc magnesium aluminum helium
Answer
Brief Explanations:
The atomic number is the number of protons in an atom's nucleus. Magnesium has an atomic number of 12. Zinc has an atomic number of 30, aluminum has an atomic number of 13, and helium has an atomic number of 2.
Answer:
B. Magnesium