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Atoms and KMT

Atoms and Kinetic Molecular Theory

atoms smallest piece of matter that retains the properties of the element
nucleus very small, very dense center of the atom with a positive charge, contains protons and nuetrons
proton subatomic particle found in the nucleus, has a positive charge
neutron subatomic particle found in the nucleus, has no electrical charge (neutral)
electron subatomic particle that orbits the nucleus, has a negative charge
quark subatomic particle that makes up protons and neutrons
atomic number number of protons in the nucleus
atomic mass the average mass of an atom of an element and all its isotopes
periods (Rows) horizontal rows of elements- first element a very reactive solid, last element a very non-reactive gas
families (Columns) columns of elements who share similar characteristics
luster shininess, high melting point
malleable can be pounded into sheets- good conductors
ductile can be made into wires
solid particles vibrate in place packed tightly together
liquid particles are spaced apart more than solids; move moderately fast and flow around each other
gas particles move very fast and expand to fit the container
plasma state in which matter is heated to extermely high temperature and the electrons separate from atoms
phase change when a substance changes from one phase of matter to another due to gain or loss of heat energy
conservation of matter matter cannot be destroyed, it can only change forms
physical property any characteristic of a material such as a size or shape that you can observe without changing the identity of a material
matter solids, liquids, gases, or plasmas
mass measure of the amount of matter in an object; always constant
weight gravitational force on an object; changes depending on the amount of gravity
density the amount of mass in a certain volume; mass/volume
melting when a solid changes phase to a liquid due to the addition of heat energy; happens a the melting point
freezing when liquid changes to a solid due to a loss of heat energy; happens a the freezing point
vaporization when a liquid changes to a gas due to the additon of heat energy; happens at the boiling point
sublimation when a solid changes phases to a gas without becoming a liquid due to the addtion of heat energy
condensation when a gas changes to a liquid due to a loss of heat energy
Created by: rjaniszewski