Single-payer health care describes any country in which the government is effectively the sole insurance company: the âsingle payerâ of health insurance claims. Socialized health care describes a country in which the government owns the entire health care systemânot just the insurance companies, but also the hospitals, the nursing homes, and the doctorsâ offices.
An element is a pure substance that is made from a single type of atom. Elements are the building blocks for all the rest of the matter in the world. Examples of elements include iron, oxygen, hydrogen, gold, and helium. Atomic Number. An important number in an element is the atomic number.
The Earthâs atmosphere is composed of the following molecules: nitrogen (78%), oxygen (21%), argon (1%), and then trace amounts of carbon dioxide, neon, helium, methane, krypton, hydrogen, nitrous oxide, xenon, ozone, iodine, carbon monoxide, and ammonia.