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| isotopes are atoms of the same element with the same number of protons and __________ |
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Definition
| different number of neutrons |
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| the most common elements in most living things are... |
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Definition
| hydrogen, carbon, nitrogen, oxygen |
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| the three particles that make up an atom are... |
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Definition
| protons, neutrons, electrons |
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| a covalent bond is formed as a result of _________ |
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| the nucleus is made up of _______ and _________ |
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| a substance formed by the chemical combination of two or more elements in a fixed ratio |
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| what type of ion forms when an atom loses electrons? |
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| if an atom contains 11 protons and 12 neutrons, its atomic number is ____ |
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| water is made of __ atoms of hydrogen and __ atoms of oxygen |
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| when hydrogen and oxygen combine to form water, water is the ________ |
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| the process by which organisms keep their internal conditions relatively stable is ___________ |
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| a substance with the pH of 6 is called a ______ |
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| the space surrounding the nucleus of an atom contains __________ |
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| we use radioactive isotopes in research and medicine to ___________ |
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Definition
| observe what happens to different atoms within organisms |
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| during a chemical reaction, atoms are ___________ |
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Definition
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| a solution is a uniform ________________ |
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Definition
| mixture of 2 or more substances |
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| atomic mass of an atom is determined by the weight of __________ and ________ |
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| cholesteral is a type of _________ |
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| chemical formulas give us the following info: _______ of atoms x3 |
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| in a chemical reactions when electrons are gained they are called _______ and become negatively charged |
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| when electrons are lost, the atom become positively charged and is called a _________ |
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| which level of electrons are responsible for an atom's reactivity? |
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| in the liver lab, in which temperature were the enzymes denatured? |
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| proteins that speeds up or catalyze chemical reactions are called _______ |
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| what organic enzyme is present in liver? |
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| what is a lipid? give an example. |
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| catalysts lower the ____________ of a chemical reaction |
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| what is the building block of a carbohydrate? |
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| cellulose is a type of _______ |
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| plant store excess energy in form of _________ |
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| the differences in amino acids are in their ___________ |
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| a carbohydrate made of 2 sugar units is a _____________ |
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| most carbon-based molecules are classified as ________ |
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| what is the term used to describe the energy needed to get a reaction started? |
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| what organic compound is the main fuel supply for cellular work? |
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Definition
| simple sugar that has 1 sugar unit |
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| a steroid is a lipid molecule in which the carbon skeleton form ___ fused rings |
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| enzymes affect the reactions in living cells by lowering the _______________ of the reaction |
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| carbon can form __ bonds with other atoms |
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