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topic 1, ex. 4
Experience 4: Chemical Reactions and Conservation of Mass
| Term | Definition |
|---|---|
| press "shuffle" for a more random flashcard order (highly recommended) | press "shuffle" for a more random flashcard order (highly recommended) |
| Chemical Symbols | The symbols when substances are made of different types of elements Ex. H2O |
| Products | resulting molecules in a chemical reaction |
| Chemical Equation | equation that uses symbols and formulas to describe what happens in a chemical reaction *left side = reactant, right side = product |
| which side of a chemical equation is the reactant? (left or right) | left |
| which side of a chemical equation is the product? (left or right) | right |
| Periodic Table | chart that lists all the known chemical elements |
| Reactants | substances that react with each other to make something new |
| Law of Conservation of Mass | law stating that matter cannot be created or destroyed during chemical reactions |
| what part of a chemical equation is "yield" | the "→" sign (reactant → product) |
| what is needed for a balanced equation? | both sides of the equation must have same amount of atoms |
| what can u NOT change when balancing an equation? | you cannot change the subscript; it changes the product |
| how to balance “H2+O2→H2O” | can change it to “2H2+O2→2H2O” to balance out the equation |
| Chemical Reaction | reaction that occurs when one or more substances are converted to one or more different substances Ex. color change, odor, rusting, change in temperature, producing bubbles, etc. Ex 2. Baking a cake, boiling an egg |
| Nonmetal Characteristics | Brittle, not malleable, not shiny, lower boiling point, poor electrical conductors, etc. |
| Metal Characteristics | Good conductor of electricity,, density, hard, shiny and lustrous, high melting point, etc. |
| Metalloids Characteristics | Shiny, brittle solids, semi conductors, average heat conductivity, malleable, low elasticity, etc. |
| Mass | measurement that refers to the amount of matter that makes up an object, usually measured w/ grams (g) or kilograms (kg) |
| Volume | the amount of space taken by a matter, usually measured w/ cm3 *Formula depends on what shape Water displacement formula: initial water level - final water level = volume |
| Density | the measurement of how tightly a material is packed together d=m/v (mass divided by volume) |
Created by:
aye.grace
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