Answer:
A
Explanation:
because it loses 2 electrons
An electron in the 3s orbital. The order of electron orbital energy levels starting from lowest to highest is as follows: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.
The elements are listed in order of increasing the atomic number. Its the number that is the number of protons in the nucleus of an atom.