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3 years ago

A. This element has 12 electrons when the atom is electrically neutral.

Biology

1 answer:

Furkat [3]3 years ago

7 0

Answer A) Magnesium

The atomic number of magnesium is 12. The atomic mass of magnesium is 24.31 amu. The total number of electrons is 12. The symbol for the element is Mg.

Answer B) Calcium

The atomic number of magnesium is 20. The atomic mass of Calcium is 40.078 amu. The total number of electrons is 20. The symbol for the element is Ca.

Answer C) Nitrogen

The atomic number of nitrogen is 7. The atomic mass of nitrogen is 14.0067 u. The total number of electrons is 7. The symbol for the element is N.

Answer D) Carbon

The atomic number of carbon is 6. The atomic mass of carbon is 2.0107 u. The total number of electrons is 6. The symbol for the element is C.

Answer E) Mercury

The atomic number of mercury is 80. The atomic mass of nitrogen is 200.59 u. The total number of electrons is 80. The symbol of the element is Hg.

Answer F) Gallium

The atomic number of Gallium is 31. The atomic mass of Gallium is 69.723 u. The total number of electrons is 31. The symbol of the element is Ga.

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