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Biochemistry Questions and Answers 100% Pass

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Matter Anything that has mass and/or takes up space (volume) Element A substance that cannot be broken down into other substances by chemical reactions Molecule Any combination of atoms Compound Two or more different elements combined in a fixed ratio Atom Smallest unit of matter that retains the properties of an element Atomic Number Number of protons Mass Number Number of protons plus neutrons

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Biochemistry Questions and Answers
100% Pass
Matter ✔✔Anything that has mass and/or takes up space (volume)




Element ✔✔A substance that cannot be broken down into other substances by chemical

reactions




Molecule ✔✔Any combination of atoms




Compound ✔✔Two or more different elements combined in a fixed ratio




Atom ✔✔Smallest unit of matter that retains the properties of an element




Atomic Number ✔✔Number of protons




Mass Number ✔✔Number of protons plus neutrons

, Atomic Weight ✔✔1 mole of a sustance = atomic weight in grams




Isotope ✔✔Atom with an abnormal number of neutrons




Proton ✔✔Positively charged subatomic particle




Neutron ✔✔Subatomic particle with no charge




Electron ✔✔Negatively charged subatomic particle




Valence Electron ✔✔Outermost electrons in an atom




Covalent Bond ✔✔Sharing of electrons (Two non-metals)




Ionic Bond ✔✔Electrostatic attraction of positive and negative ions (Metal and Non-metal)




Valence shell ✔✔An atom's outermost electron shell
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