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Vocab List 3

Chapters 2.3, 3.1 and 3.2

TermDefinition
Pressure The force pushing on a surface divided by the area
Boyle's Law A principle that describes the relationship between the pressure and volume of a gas
Charles' law A principle that describes the relationship between the temperature and volume of a gas
Nucleus the central core of an atom containing protons and neutrons
atom the basic particle of all elements
electron the negatively charged particle that goes around the nucleus randomly
mass number the sum of protons and neutrons
proton the positively charged part of the nucleus
atomic number the number of protons
model a diagram, mathematical statement or object that helps understand a concept
neutron a small particle in the nucleus of an atom with no charge
isotope an element that has added or subtracted neutrons
atomic mass the average mass of all isotopes of an element
periodic table a chart of the elements organized by the number of protons
period a horizontal row in the periodic table
group elements in the same column
chemical symbol a one to three letter representation of an element
alkali metal an element in group 1
alkali earth metal an element in group 2
halogen an element in group 17
noble gas an element in group 18- does not react
metalloid an element that is both a metal and nonmetal
transition metals an element in group 3-12
Created by: 2baruss