Question

What information is given by the noble-gas notation [Ne]3s^2 and what element does this represent?

Answer 1

If there are 12 electrons, and the element in neutral, the element must be a Group 2 metal.

Explanation:

If there are 12 electrons, the neutral element must contain 12 positive charges, i.e. `Z,"the atomic number"=12`. Look up your Periodic Table, (there should be a copy on your desk now, and tell us the element.