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PS 27 Week Test
creates a new substance like burning paper (bonds have to be broken or formed and the chemical formula must change)
What is the difference between chemical and physical changes?
See answer #2
two or more different types of elements chemically combined
What is the difference between a chemical formula and chemical equation?
Chemical equation- H2 + O -> H2O
anything in motion
anything plugged in
visible light, infrared, ultraviolet, x-rays...
suns, stars, bombs
changes only a portion of its properties-tearing paper
two or more elements that are not chemically combined
atoms that are exactly alike (H2 is an element)