Metabolic Process notes These are just notes for

Chemical stand of Life (1) Biology is the study of biography organisms. In turn, organisms argon chemical machines, i.e. organisms argon composed of molecules, which argon collections of smaller units called jots. 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 get-up-and-go levels. -as an electron moves still from the nucleus of an atom, its potential energy increases. Why? Energy is scuttlebutt to reduce its everyday charity to the positively energised nucleus. -the outer(prenominal) orbital or energy levels ar termed the valence orbital; the valence electrons ** the chemical behaviour of an atom is determined by the moment and arrangement of the valence electrons. The pauperisation for stability - there argon a group of elements in the Periodic fudge called the noble gases that are inert (non-reactive). ask out for helium that has 2 valence electrons, all members of this group give up 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, recidivate, or portion 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 ions called anions. -an ionic bond forms between alloy cations and non-metal anions; it is plain 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 appendix of... If you want to get a full essay! , come in it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper