Question

I am the 2nd most abundant element in the Earth's crust and have 14 neutrons. What am I?

Answer 1

Silicon.

Explanation:

Silicon has an atomic number of 14, so most isotopes of Silicon would have 14 neutrons. It is also 2nd most abundant element by weight in the Earth's crust`.^1`

Footnote 1: Weight of all elements in Earth's crust