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| An unproved or preliminary explanation that can be tested by comparison with scientific evidence. |
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| A type of chemical bond formed by shared electrons. They're between nonmetallic elements of similar electronegativity. |
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| A quantity that can be precisely, often with a numerical value. |
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| A bond that transfers an electron from one atom to another resulting in attraction between oppositely charged ions. |
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| the variable in the experiment that is changed |
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| The variable that remains the same throughout the experiment |
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| The electrons in an atom' outer energy level. In a periodic table, they have the same number on valence electrons in a certain row. |
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| A controlled Experiment is one in which only one variable is tested at a time. |
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| When the electrons are shared but they aren't shared equally ex: H2O. |
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| Information collected during an experiment or other scientific inquiry. Data are often values of variables measured in an experiment |
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| Information collected during an experiment or other scientific inquiry. Data are often values of variables measured in an experiment |
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| How do you calculate the volume of an irregular object? |
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| The amount of matter an object contains |
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| The downward force of gravity acting on mass |
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| The mass of matter per unit volume. |
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| A substance that includes more than one type of element and/or compound. |
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| A mixture of two or more substances that is uniform at the molecular level. |
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| A substance whose smallest particle include more than one element chemically bonded together |
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| In a solution, it's presented as the bigger amount. |
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| In a solution, it's the substance being dissolved also the smaller substance. |
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| The ratio of solute to solvent in a solution. |
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| The amount of solute that can be dissolved in a specific volume of solvent under certain conditions. |
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| During a physical change, a substance changes form, but remains the same substance. |
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| A substance that produces hydronium ions (H3O+) when dissolved in water. Acids have a pH less than 7. Common Acids: Citruses, vinegar, lemon juice. |
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| A chemical change turns one or more substances |
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| A substance that produces hydroxide ions (OH-) when dissolved in water. Bases have a pH greater than 7. Common Bases: Ammonia, baking soda, and soap. |
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| Indicators show if a product is an acid or not. An example of an indicator is litmus paper. |
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| What is the law conservation of mass? |
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| The mass of the reactants equals the mass of the products. |
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| A chemical reaction whereby an acid and a base react to form water and a salt. |
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| The study of organic chemistry |
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| He created the first periodic table. He was an epic man. |
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Protons are posotive like happy face.
Electrons are negative like sad face.
Neutrons are naootrol like hehehe. |
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| The number that determines how many particles are in an atom (neutrons, protons, electrons ). |
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| They are different types of atoms of the same chemical element, each having a different number of neutrons. |
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| Metals are hard. And shiny. They also have good malleability (shapeable) ductility (being able to be hammered--thinned) conductivity (electrical power) |
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| synthesis:chemical reaction |
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| decomposition: chemical reactions |
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| A solution of two or more solids. For example steel. |
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| single displacement: chemical reactions |
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| a reaction is exothermic if it releases more energy than it uses. |
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| A reaction is endothermic if it uses more energy than it releases |
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1: Alikai Metals
2: Alakai Earth Metals
3-12: Transition Metals
13-17: Non-metals
18: Halogens |
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| Non-Metals Physical properties |
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| They are brittle, have low density, dull, and they are poor conductors. |
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| The elemnts on the border between metals and nonmetals. |
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| what is some evidence of chemical reactions? |
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-formation of a percipitate
-formation of gas
-temperature change
-changes in properties
-color change |
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| the resistance of a liuquid to shear forces and hence to flow. |
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| solids that do not have a repeating pattern of molecules or atoms |
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| solids that have an orderly, repeating pattern of molecules or atoms |
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| temperature outside affects the temperature on the inside. |
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| change from gas to liquid at a temperature below the boiling point |
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