Bio Basic Chemistry Study Guide

the substance(s) of which any physical object consists or is composed

a form of matter that occupies space, has mass and cannot be broken apart into a different form of matter by ordinary, physical or chemical means

molecule composed of two or more different elements in unvarying proportions

positively charged particles of the atomic nucleus

uncharged particles of the nucleus of all atoms except hydrogen

negatively charged particles that can occupy a volume of space around an atomic nucleus

the region around a nucleus that indicates probable location or an electron

an element where your atoms (electrons) change

different number of neutrons/types of atoms in one element

activation energy
the minimum amount of energy required to activate atoms to a point where they can go through physical transport

valence electron
an electron associated with an atoman that can participate in the formation of a chemical bond which can determine its chemical properties

ionic bond
these form when one atom gives up an electron to another, thus creating a positive ion that is attracted to a negative ion

covalent bond
forms when two atoms share one or more pairs of electrons

polar covalent
a bond in which electrons are shared between elements having a difference in electronegativity

the process of adhering or sticking to a surface or object

the action of something forming a unite whole

surface tension
the force that causes the molecules on the surface of a liquid to be pushed together and form a layer

a scale ranging from 0-14 comapring the concentration of hydronium ions (H3O+) and hydroxide ions (OH) in a solution

substance that donates H+ when dissolved in water

substance that accepts H+ when dissolved in water

a substance in animals and plants that helps to cause natural processes

the central and most important part of an object, forming the basis for its activity and growth.