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Wednesday, July 17, 2013

Everything you need to know about a cell - definitions in outline form, interpretation of Honors Biology intro.

This isnt written in composing form, but a relaible inclination of an orbit of terms to help you orginize your thoughts, or clarify problems. I do an A in this Honors biology! I.Chemical foundations for the Cells A.Organization of matter -(elements, compounds, mixtures) Elements- materials that cannot be decomposed into mental objects with divers(prenominal) properties. Compounds-made of antithetic elements in fixed and consistent pro ingredients Mixtures-two or much elements dedicate in varying proportions 1.Atoms and ions a. soupcons- smallest portion of an element that even so retains properties of the element; contains protons, neutrons, and electrons b.molecules- units of two or more fragments c. miteic marrow- core of division that accounts for almost all its cud; (-)electrons move rapidly finish out it d.atomic number- number of (+) protons e.mass number- number of protons and neutrons f.ion- an atom (or compound) that has gained or lost 1 or more electrons, so is positive or negative in charge 2.Isotopes- vary in number of neutrons a.radioactive isotopes- have unstable nuclei; breakdown over time 3.Arrangement of electrons a.         orbitals- regions of outer space around nucleus where electrons whitethorn be at whatever instant. Each contains 1 or 2 electrons b.         electrons closest to nucleus are at unskilled energy levels B.         Bonds between Atoms 1.         garret bond- two ions bound by mutual attraction of opp acent charges (Na+Cl-) 2.         covalent bonds- atoms share electrons a.
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        non- cold- both(prenominal) atoms exercise same pull on divided electrons b.         polar- hotshot atom exerts more pull than the early(a) on shared electrons; one atom is slightly positive, the contrasting slightly banish; terminate charge zero 3.         Hydrogen bond- an electronegative atom fallible attracts an H atom that is covalently bonded to a different atom 4.         Hydrophobic interactions (not consecutive bonds) a.         hydrophilic- substance is attracted to piss molecules due to polar nature b.         hydrophobic- substance is repelled by water molecules due to non-polar... If you want to modernise a wide-cut essay, prepare it on our website: Ordercustompaper.com

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