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4.MA2AtomicStrucure

atoms, subatomic particles

TermDefinition
matter anything that takes up space and has mass
mass the amount of matter in something
volume the amount of space something takes up
atoms building block of matter
nucleus center of the atom; contains all the mass, protons, and neutrons
proton positively charged subatomic particle; located in nucleus- identifies what kind of element it is
neutron zero charge subatomic particle; located in nucleus
electron negatively charged subatomic particle, tiny; located in electron cloud around the nucleus
electron cloud area around the nucleus where electrons are located; different energy levels where electrons tend to be
atomic number number of protons in an atom; identifies the element
atomic mass mass or weight of an atom- average mass of protons AND neutrons
AMU SI unit to describe the mass of an atom and its subatomic particles
element simplest form of matter that is a pure substance; organized on Periodic Table and is made up of one type of atom
compound pure substance of 2 or more chemically bonded elements
mass number exact number of protons AND neutrons in an element/atom
Created by: jparsons
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