Biology 2.2

The center of an atom which contains the protons and nuetrons

Negatively charged particle located in the space surrounding the nucleus

pure substance that consists entirely of one type of atom

One of several forms of a single element which contains the same amount of protons but different number of nuetrons

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

Chemical bond formed when one or more electrons are transferred from one atom to another

Atom that has a positive or negative charge

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

Slight attraction that develops between oppositely charged reigons of nearby molecules

weak attraction between a hydrogen atom and another atom

Attraction between molecules of the same substance

Force of attraction between different kinds of molecules

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

Type of mixture in which all the componets are evenly distrubuted

Substance that is dissolved in a solution

Dissolving substance in a solution

mixture of water and nondissolved material

Scale with values 0-14 used to measure the concentration of h+ ions in a solution

Compound that forms hydrogen ions in solution

Compound that produces hydrogen ions

Compound that prevents sharp, sudden changes in pH