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chemical symbols that indicate the number of atoms of each of the elements found in a compound
a process in which atoms of the same or different elements rearrange themselves to form a new substance - some clues that one is taking place or has taken place may include bubbles, smoke, a strong smell, color change, temperature change, or a sizzling sound
a physical system that is not open and does not interact with other systems it cannot exchange matter or energy with its surroundings
Law of conservation of mass
a law that states that during a chemical reaction matter cannot be created or destroyed it just changes form
a physical system that is open and does interact with other systems - it does exchange matter or energy with its surroundings
the substances that are present before a chemical reaction occurs - they are altered during the chemical reaction and create new products
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