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chemistry, atoms

Atoms, the building blocks of matter

law of conservation of mass mass is neither created nore destroyed during ordinary chemical reactions or physical changes
law of definite proportions a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample
law of multiple proportions If two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers
atom the smallest particle of an element that retains the chemical properties of that element
atomic number the number of protons in the nucleus of each atom of that element
isotopes atoms of the same element that have different masses
nuclide a general term for any isotope of any element
atomic mass unit amu, 1/2 the mass of a carbon-12 atom
average atomic mass weighted average of the atomic masses of the naturally occurring isotopes of an element
mole amount of a substance that contains as many partiles as there are atoms in exactly 12g of carbon-12
molar mass mass of one mole of a pure substance
Created by: rharris2