Elements or compounds that enter into a chemical reaction

elements or compounds made by a chemical reaction

Energy that is needed to get a reaction started

Substance that speeds up the rate of a chemical reaction

Protein catalyst that speeds up the rate of specific biological reactions

Reactant of an enzyme-catalyzed reaction. Answer:

a basic unit of matter

The center of an atom, which contains the protons and neutrons. Answer:

negatively charged particle; constantly moving around the nucleus

Pure substance that consists entirely of one type of atom. Answer:

One of several forms of a single element, which contains the same number of protons but a different number of neutrons. Answer:

Substance formed by the chemical combination of two or more elements in definite proportions. Answer:

A Chemical bond formed when one or more electrons are transferred from one atom to another. Answer:

An Atom that has a positive or negative charge. Answer:

Type of bond between atoms in which the electrons are shared. Answer:

Smallest unit of most compounds that displays all the properties of that compound. Answer:

Weak attraction that develops between oppositely charged regions of nearby molecules.

Weak attraction between a slightly positive hydrogen atom and another atom that is slightly negative. Answer:

Attraction between molecules of the same substance. Answer:

Force of attraction between different kinds of molecules. Answer:

Material composed of two or more elements or compounds that are physically mixed together but not chemically combined. Answer:

Type of mixture in which all the components are evenly distributed. Answer:

Substance that is dissolved in water. Answer:

Dissolving substance in a solution. Answer:

Mixture of water and nondissolved material. Answer:

Scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution. Answer:

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

A Compound that forms hydroxide ions (OH-) in solution; a solution with a pH of more than 7. Answer:

A compound that prevents sharp, sudden changes in pH. Answer:

A small chemical unit that makes up a polymer. Answer:

Molecules composed of many monomers, makes up macromolecules. Answer:

Compound made up of carbon, hydrogen, and oxygen atoms; type of nutrient that is the major source of energy for the body. Answer:

Macromolecules made mostly from carbon and hydrogen atoms; includes fats, oils, waxes. Answer:

Macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. Answer:

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

Macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair. Answer:

Compound with an amino group on one end and a carboxyl group on the other end. Answer: