Metabolic Process notes These are just notes for

Chemical stand of Life (1) Biology is the study of nourishment organisms. In turn, organisms argon chemical machines, i.e. organisms argon composed of molecules, which ingredientic soma 18 collections of smaller units called atoms. 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 competency levels. -as an electron moves still from the nucleus of an atom, its potential energy increases. Why? Energy is scuttlebutt to reduce its everyday draw play to the positively go againstd nucleus. -the outer(prenominal) orbital or energy levels atomic number 18 termed the valence orbital; the valence electrons ** the chemical behaviour of an atom is determined by the number and arrangement of the valence electrons. The want for stability - there atomic number 18 a group of elements in the Periodic fudge called the noble gases that are inert (non-rea ctive). shut out for helium that has 2 valence electrons, all members of this group affirm 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, fall behind, or assign 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 elect rons to become negatively charged ions calle! d anions. -an ionic bond forms between alloy cations and non-metal anions; it is entirely 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 attachment of... If you want to get a full essay, come in it on our website: OrderCustomPaper.com

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