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Chemistry II
Chemistry Review II
| Term | Definition |
|---|---|
| Catalyst | A substance that speeds up a chemical reaction by reducing the activation energy needed. |
| Reactants | The substances on the left side of a chemical equation |
| Nucleus | The part of the atom that gives it its mass |
| Ductile | Metals can be drawn into thin wires because they are ______ |
| Metals | Elements to the left of the zigzag line on the Periodic table |
| Hydrogen | there are 2 atoms of ____ in a molecule of water |
| Compound | Two or more different elements chemically bonded |
| Malleable | Metals can be hammered into thin sheets because they are ___ |
| Positive | A nucleus has this type of charge |
| Yields | The arrow in a chemical equation |
| Water | A surprising byproduct of a burning candle |
| Molecule | 2 or more atoms chemically bonded |
| Balanced | A chemical equation with the same atoms before and after the reaction |
| Homogeneous | A mixture that appears to be just one substance |
| Subscript | A # that cannot be changed when balancing chemical equations |
| Endothermic | A reaction in which heat energy is drawn in |
| Precipitate | A solid that forms out of 2 liquids reacting |
| Isotope | Atoms of the same element with different #'s of neutrons |
| Family | Elements found in a column on the Periodic table |
| Alkali Metals | The family with the most highly active solids |
| Proton | What is the positive subatomic part of an atom |
| Neutral | What type of charge does a neutron have? |
| Matter | A word that refers to all the substance in the universe |
| Sodium | A deadly element that is a part of the salt molecule |
| Coefficients | The numbers that can be changed to balance a chemical equation |
| Valence | The # of electrons on the outer energy shell of an atom |
| Chemical Reaction | Something that must happen to form a compound |
| Metalloids | Elements that have properties of both metals and non metals |
| Period | Elements who’s atoms all have the same # of energy rings |
| Molecule | At least 2 atoms chemically bonded |
| Periodic | Something with a regular repeating pattern is also called __________ |
| Democritus | The first person to propose the idea of the atom |
| Rutherford | His experiment showed that atoms are mostly empty space |
| Thomson | His experiment gave evidence of electrons |
| Mixture | 2 or more substances mixed but not chemically bonded |
| NobleGases | Elements in family 18 are called _________ |
| Transmutation | When an atom decays and becomes another element |
| Halflife | The amount of time it takes half of a radioactive sample to decay |
Created by:
coach_fletcher
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