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| How do you find the number of neutrons in an isotope? |
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Definition
| Subtract the atomic number (or number of protons, respectively) from the mass number given. |
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How do you determine the number of valence electrons for a neutral atom? |
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Definition
| The number of valence electrons is equal to the atom's main group number. |
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| Changes the substance by making a new one. |
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| Changes the physical appearance of the substance. |
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| Why don't noble gases react with other elements? |
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| Their outer shells are full. |
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| Law of Conservation of Mass (real-life scenario) |
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| If you put one L of water in a bottle, it will weigh one kg more. |
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| a substance made up of two or more elements chemically combined in a fixed proportion by mass. |
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| What does the Atomic Number of an element represent? |
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| It is the number of protons the element has. |
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| Which lab tool is used to measure mass? |
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| a principle stating that energy cannot be created or destroyed, but can be altered from one form to another. |
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What is the best tool to measure liquid volume?
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| the total number of protons and neutrons in a neucleus |
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| the total energy of molecular motion in a substance |
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Definition
| A measure of the average energy of molecular motion in a substance |
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