Articles by David Hart

When a project comes my way that’s not an everyday thing, it’s stimulating, and in some cases, it’s downright exciting. After my military service in the early ‘90s, I went to work in the field as a carpet and HVAC cleaning technician. 

In chemistry, we represent elements with letters (for example “O” stands for the element “oxygen”), and the small numbers to the lower-right of the element indicate the number of atoms of that element in the molecule.