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Ch2 Part1 Basic Chem

QuestionAnswer
anything that occupies space and has mass Matter
equal to matter in the object mass
remains constant regardless of gravity mass
solid, liquid, gas three states of matter
the capacity to do work, and exists in two forms energy
energy of motion kinetic
stored energy potential
chemical, electrical, mechanical, radiant four types of energy
energy stored in chemical bonds chemical energy
results from the movement of charged particles electrical
energy directly involved with moving matter mechanical
energy that travels in waves radiant
energy is... easily converted from one form to another
substances that cannot be broken down into simpler substances by ordinary chemical means elements
carbon, hydrogen, nitrogen, oxygen make up roughly 96% of body weight
smallest particle of element retain characteristics of element atoms
elements are designated by.. 1, 2, or 3 letter abbreviation called the atomic symbol
each atom has a central -packed with protons and neutrons nucleus
positive charge weighs 1 amu proton
no charge weighs 1 amu Neutrons
found around the nucleus negative charge weightless electrons
protons= electrons
atoms are electrically.. neutral
2D model of atomic structure Planetary model
3D model talking about orbital regions, not orbital patterns orbital model
elements are identified based on their number of protons, electrons, neutrons
atomic number= # of protons in an element
same number of protons and electrons of the same element isotopes
average of the relative weights of all isotopes of an element atomic weight
heavier unstable isotopes of an element that spontaneously decompose into more stable forms radioisotopes
time required for a radioactive isotope to lose 1/2 of it's radioactivity half-life
combination of 2 or more atoms molecule
2 or more atoms of the same element combined molecule of that element
2 or more atoms of difference elements combined molecule of a compound
substances made of two ore more components mixed physically mixture
homogeneous mixtures of compounds that may be liquids, gases, or solids solution
greatest amounts solvents
smaller amounts solutes
may be described by its concentration expressed as % or in terms of molarity solutions
heterogeneous mixtures colloids or emulsions
heterogeneous mixtures with large (often) visible solutes that tend to settle out suspensions
difference between mixtures and compounds chemical bonding does not occur in mixtures
can be separated into chemical components by physical means mixtures
separation is done by chemical means compounds
an energy relationship between electrons of the reacting atoms chemical bond
Created by: jennipehrdee