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Science somthing 1-2
I finished it WOOT......... um... ok i guess WOOT again!
Question | Answer |
---|---|
Law of Conservation of mass | The products of a chemical reaction must contain the same number of atoms of each kind as the reactants |
Physical change | A change in an object's physical appearance, but it is still the same compound or element and can be returned to its former state. |
Element | A substance that cannot be broken down into a simpler substance |
Chemical Formula | A representation of the chemical names of substances. |
Reactant | A substance that exists before a chemical reaction begins. |
Product | A substance that forms as a result of a chemical change |
Coefficient | The number in front of an element in a formula that shows how many molecules there must be to balance the equation. |
Subscript | a value to the bottom right of an element symbol telling how many of one atom are in a compound. |
Chemical Change | Occurs when one substance joins with another substance to form a new substance. |
Element (Diatomic) Molecule | A molecule made of two atoms of either the same or different elements |
Chemical Reaction | Process that produces a chemical change often marked by a sound, heat light, etc. |