That sounds like 714N, which is nitrogen. You almost certainly haven't taken a breath that wasn't mostly this odorless, colorless gas.
Nitrogen
Silicon is a non metal element. Atomic mass number of it is 28.
The mass number identifies the total number of protons and neutrons in an atom's nucleus. It is represented by the letter A in the notation of an element, such as Carbon-14 where 14 is the mass number.
Nitrogen has a gram atomic mass of 14.0067, an atomic number of 7, and the chemical symbol N.
It represents the mass number of that particular isotope.
Nitrogen!!!
Nitrogen
Nitrogen is a non meta element. Atomic mass of it is 14.
Nitrogen is a non metal element. Mass number of it is 14.
Nitrogen is a metal element. Atomic mass of it is 14.
Nitrogen
Carbon is a non meta element. Atomic mass of it is 12.
Nitrogen is a non metal element. Atomic mass number of it is 14.
Nitrogen is a non metal element. Mass number of it is 14.
Carbon is a non metal element. Atomic mass number of it is 12.
carbon
Silicon is a non metal element. Atomic mass number of it is 28.