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Chemical stern of Life (1) Biology is the study of existent organisms. In turn, organisms argon chemical machines, i.e. organisms argon composed of molecules, which be collections of smaller units called molecules. Therefore, we bespeak to consider the chemistry of life or biochemistry. Chemical Bonding -electrons occupy divers(a) positions (distances) from the nucleus of an atom, known as zip fastener levels. -as an electron moves still from the nucleus of an atom, its potential energy increases. Why? Energy is scuttlebutt to reduce its everyday haulage to the positively iron bootd nucleus. -the outer(prenominal) orbital or energy levels are termed the valence orbital; the valence electrons ** the chemical behaviour of an atom is determined by the material body and arrangement of the valence electrons. The assume for stability - there are a group of elements in the Periodic fudge called the noble gases that are inert (non-reactive). overlook for helium that h as 2 valence electrons, all members of this group take a shit 4 pairs or 8 valence electrons. Chemical Basis of Life (2) Therefore 8 seems to be a magic number i.e. the noble gases do not flack to gain, resort, or dower electrons with other atoms. All other elements take in charge to gain, lose and share electrons to achieve the ability of the noble gases. These interactions are the cause of chemical reactions that will establish the chemical bonds among atoms.

Types of Bonds 1.Ionic - Atoms lose electrons to have positively charged ions called cations -atoms gain electrons to become negatively charged io ns called anions. -an ionic bond forms betwe! en alloy cations and non-metal anions; it is but electrostatic attraction involving opposite charges. e.g. table sodium chloride - NaCl - atomic number 11 has 1valence electron; if it loses this, it becomes stable, resulting as the cation Na+ -Chlorine has 7 valence electrons; the addendum of... If you want to get a full essay, come in it on our website: OrderCustomPaper.com

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