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Unit 1 L1

Atoms & Elements

TermDefinition
matter anything that takes up space and has mass
element a material that cannot be broken down into anything simpler
atom the smallest unit of an element that still retains (has) the properties of that element
nucleus the center of an atom, made up of protons and neutrons
proton particles in an atom with one unit of positive electric charge
atomic number the number of protons in an atom
neutrons particles in an atom with no electric charge. They are neutral
electrons particles in an atom with a negative electric charge
molecules particles made up of more than one atom joined together
periodic table a table that arranges and shows all of the known elements
particles the parts in an atom: proton, neutron, electron
Created by: mrdollas