Center of an atom

one of several forms of a single element, which contains the same number of protons but different numbers of neutrons

type of bond between atoms in which the electrons are shared

two or more atoms held together by covalent bonds

a slight attraction that develops between the oppositely charged regions of nearby molecules

An attraction between molecules of different substances

type of mixture in which all the components are evenly distributed

compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7

substance that prevents a sharp change in pH by absorbing or releasing hydrogen or hydroxide ions

molecules composed of many monomers; makes up macromolecules

made mostly from carbon and hydrogen atoms, includes of fats, oils and waxes

subunit of which nucleic acids are composed; made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base

macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus

process that changes, or transforms, one set of chemicals into another set of chemicals

Energy needed to get a reaction started

macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair

What molecule is this?

what molecule is this?

A subatomic particle that has no charge, found in the nucleus of an atom