Hydrocarbon, any of a class of organic chemical compounds composed only of the elements carbon (C) and hydrogen (H). The carbon atoms join together to form the framework of the compound; the hydrogen atoms attach to them in many different configurations. Hydrocarbons are the principal constituents of petroleum and natural gas.
Use slab in a sentence. 1  a piece that is flat, broad, and fairly thick: a slab of concrete, a slab of bread.  any of the rough, outer pieces cut from a log, as in sawing it into lumber.
Monolithic slabs. Monolithic slabs are foundation systems constructed in one single concrete pour, typically consisting of a 4 inch thick concrete slab with interior thickened portions under load bearing walls and also thickened at all perimeter edges, while the stem wall slabs are comprised of three components.onolithic slabs. Monolithic slabs are foundation systems constructed in one single concrete pour, typically consisting of a 4 inch thick concrete slab with interior thickened portions under load bearing walls and also thickened at all perimeter edges, while the stem wall slabs are comprised of three components.