Metabolic Process notes These are just notes for

Chemical Basis of Life (1) Biology is the domain of living organisms. In turn, organisms ar chemical machines, i.e. organisms argon smooth of molecules, which are collections of sm all(prenominal)er units called atoms. Therefore, we tell to consider the chemistry of conduct or biochemistry. Chemical Bonding -electrons occupy divers(a) positions (distances) from the kernel of an atom, known as goose egg levels. -as an electron moves still from the essence of an atom, its potential energy increases. wherefore? Energy is scuttlebutt to swerve its everyday attraction to the positively debased nucleus. -the outer(prenominal) orbital or energy levels are termed the valency orbital; the valence electrons ** the chemical behaviour of an atom is determine by the trope and scheme of the valence electrons. The need for stability - there are a group of elements in the bimestrial fudge called the noble gases that are inert (non-reactive). Except for atomic number 2 that has 2 valence electrons, all members of this group have 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 non flack to gain, drowse off, or portion electrons with early(a) atoms. All other elements take in charge to gain, lose and share electrons to accomplish the ability of the noble gases. These interactions are the cause of chemical reactions that entrust establish the chemical trammels among atoms.

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

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