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Definition
| a substance that can't be broken down into simpler substances. |
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Definition
| On Earth, about___ elements are essential to living organisms. |
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| Each element is abbreviated by a one or two letter____ |
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| -Are present in living things in very small amounts.Examples are iron & magnesium. |
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| Properties of elements are determined by the structure of their atoms. True or False ? |
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| What is the maximum number of electrons in the third energy level ? |
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Definition
| What is the maximum number of electrons in the second energy level ? |
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Definition
| What is the maximum number of electrons in the first energy level ? |
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Definition
| H2O(no longer resembles either hydrogen or oxygen gas) Compound or element? |
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Definition
| A substance that CAN be broken down into a chemical reaction.Compound or element ? |
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| Carbon, the substance represented by the symbol C.Compound or element? |
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Definition
| Why must chemical equations always balance? |
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Term
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Definition
| Which number indicates the number of atoms of each element in a molecule of a substance? |
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Term
| When the mixture isn't evenly distributed. |
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Definition
| When is a mixture not a solution? |
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Term
| An acid forms H+ ions in water, while a base forms OH- ions in water. |
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Definition
| Difference between an acid and base? |
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Term
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Definition
| The 1st scientist to observe evidence of the random motion of molecules was: |
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Term
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Definition
| Net movement of particles form an area of higher concentration to an area of lower concentration is called: |
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Term
| Random movement o/ particles |
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Definition
| Diffusion occurs b/c/ of: |
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Term
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Definition
| When a few drops of colored corn syrup are added to a beaker of pure corn syrup, the color will: |
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Term
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Definition
| Diffusion can be accelerated by: |
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Definition
| When materials pass into and out o/ a cell at equal rates, there is no concentration in the cell. The state of the cell is: |
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Term
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Definition
| Difference in concentration of a substance across space is called: |
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Term
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Definition
| Carbon atoms can bond together in straight chains, branched chains, or rings.True or false? |
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Term
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Definition
| Large molecules containing carbon atoms are called micromolecules. True or false? |
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Term
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Definition
| Polymers are formed by hydrolysis. True or false? |
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Term
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Definition
| Cells use carbohydrates for energy. True or false? |
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Term
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Definition
| C6H12O6, Glucose, and fructose are examples of____ |
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Term
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Definition
| C12H22O11&sucrose are examples of___ |
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Term
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Definition
| Starch,Cellulose, and glycogen are examples of____ |
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