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
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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.