Nitrogen

Nitrogen, the seventh element, represents the Holy Spirit/Spirit of God who gives us breath of Life.

Colorless Nitrogen (7) makes up 78.084% of Earth's atmosphere. The atmosphere/air represents the spiritual realm (Air and God are both unseen, but we can see the effects of wind like we can see the effects of God).

In Hebrew, the word hvr is used for breath, wind, and Spirit showing the representation of air as the Spirit of God.

Gas = Spiritual

If Nitrogen has five electrons in it's outer electron shell, this points symbolically to the spiritual life (fifth letter) we receive in the Breath of Life from the Spirit of God.