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Atoms and Compounds

test knowledge of matter

proton located in the center of the atom and has a positive charge
electron smallest particle of an atom, located outside of the nucleus
neutron an uncharged particle in the nucleus of an atom
atom the smallest part of an element that all matter is made of
nucleus the center part of an atom
protons and neutrons located in the center of the atom; gives the atom its mass
atomic mass protons and neutrons in the nucleus
atomic number determines what type of element it is; the number of protons in an atom
physical change a change in shape, size, color,phase but not in chemical make-up
chemical change new substances are formed with new properties because atoms break their bonds
chemical bond a strong electrical force between two atoms
compound when 2 or more atoms of elements interact or combine
The Periodic Table of Elements is arranged by increasing... atomic number
chemical symbols Elements are represented by one, two, or three letters
matter anything that has mass and takes up space
molecule two or more atoms chemically bonded
Created by: Susan_Johnson