Common Compounds – Vocabulary Review

Ten vocabulary flashcards covering the key compounds, atoms, and related concepts mentioned in the lecture notes.

Hydrochloric Acid (HCl)

An acid found in the stomach that aids digestion and is also used as a cleaning agent; made of one hydrogen atom and one chlorine atom.

Methane (CH4)

A simple hydrocarbon composed of one carbon atom bonded to four hydrogen atoms.

Ammonia (NH3)

A compound consisting of one nitrogen atom bonded to three hydrogen atoms.

Stomach Acid

The hydrochloric acid naturally present in the stomach to help break down food during digestion.

Cleaning Agent

A substance, such as hydrochloric acid, employed to remove stains or sanitize surfaces.

Hydrogen Atom

The lightest type of atom; appears once in HCl, three times in NH3, and four times in CH4.

Carbon Atom

The central atom in methane, present as a single atom in CH4.

Nitrogen Atom

The single central atom found in ammonia (NH3).

Chemical Formula

A shorthand representation (e.g., HCl, CH4, NH3) showing the kinds and quantities of atoms in a compound.

Common Compounds

Frequently encountered substances such as hydrochloric acid, methane, and ammonia discussed in the lecture.