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Physical Science

atom The basic particle from which all elements are made.
atomic number The number of protons in the nucleus of an atom.
electron A tiny, negatively charged particle that moves around the nucleus of an atom.
element A pure substance that cannot be broken down into other substances by chemical or physical means.
gas A state of matter with no definite shape or volume.
group Elements in the same vertical column of the periodic table; also called family.
liquid A state of matter that has no definite shape but has a definite volume.
molecule A molecule made of 2 or more atoms bonded together.
period A horizontal row of elements in the periodic table.
Periodic Table A chart of the elements showing the repeating pattern of their properties.
proton A small , positively charged particle in the nucleus of the atom.
neutron A small particle in the nucleus of the atom, with no electrical charge.
solid A state of matter that has a definite shape and a definite volume.
thermal energy The total energy of all the particles of an object.
Law of conservation of matter The principle that the total amount of matter is neither created nor destroyed during any physical or chemical change.
chemical change A change in which one or more substances combine or break apart to form new substances.
chemical property A characteristic of a pure substance that its ability to change into a different substance.
flammability The ability to catch fire.
physical change A change in a substance that does not change it's identity.
physical property A characteristic of a pure substance that can be observed without changing it.
reaction The ease and speed with which an element combines , or reacts, with other elements and compounds.
solubility The ability to dissolve in another substance.
Created by: liddelltorrance