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Physical Review

Science final

Matter anything that has mass and occupies space
Mass (grams) a measure of how much matter is in an object
Volume (liters/cubic centimeters[L*W*H]) the amount of space that matter occupues
Density (mass/volume) The ratio of the mass of a substance to its volume
Atoms The basic particle from which all elements are mad of
Neutrons A small particle in the nucleus of the atom
Protons A positively charged particle part of an atoms nucleus
Electrons A negatively charged particle that is formed outside the nucleus of an atom
Molecules (more than one atom) A neutral particle made of two or more atoms joined by a covalent bond
Elements A pure substance that cannot be broken down into other substances by chemical and physical means
Compound A pure substance made of two or more elements chemically combined
Chemical Symbol A one or two letter representation of an element
Chemical Formula A combination of symbols that represent the elements in a compound and their porportions
Chemical Equation a short easy way to show a chemical reaction using symbol
Synthesis A chemical reaction in which two or more simple substances combined to form a new more complex substance
Decomposition A chemical reaction that breaks down compounds into similar products
Single Replacement One thing is replaced
Double Replacements Two things are replaced
Buffer Something that slows down a reaction
Catalyst Speeds up a reaction
Carbohydrates An energy rich organic compound made of elements Carbon Hydrogen and Oxegyn
Proteins An organic compound that is polymer of amine acids
Vitamins and Minerals chemicals that our body uses to maintain health and carry on life functions
Lipids An energy rich organic compound carbon oxygen and hydrogen
Water Neutral deficiency 1 pH of 7 and h2o
Created by: Hk123