Chem Lect

AMSA household 5 Owlcove Mitten hall 5pm Sept 9 homework repayable on mastering chemical science What is chemistry? Chemistry is a recognition that studies the composition and properties of subject field (solids, runnys, muffes, protons neutrons, electrons atoms molecules ions etc, , the changes that return undergoes (chemical reactions, physical changes and the energies associated with these changes. Matter is serene of atoms molecules ions. Atoms represent as spheres. Solids ar atoms closely packed and nuclear number 18 in resolute positions and viabrate. As you incereese temporary they vibrate much and to a greater extent. Liquids- most atoms touch lacunas betwixt atoms and not in fixed position. Gases- atoms jadet touch unless they conflict with eachother. Lots of vacuous space between atoms and move at high speeds and at haphazard motion. There is no matter in the spaces between atoms. Atoms be spherical Molecules- 2 or more atoms bonded together. *******The properties of matter be intractable by the properties of the atoms/ molecules/ ions that make up that matter. CO- very thermolabile and ototoxic, its a gas, no smell, and its colorless. CO2- relatively unreactive, its non toxic, its a gas but if you cool it scratch off it will bid into a solid it is called dry ice, no smell. Eg.

H2O- water H2O2- hydrogen peroxide, its toxic OH- hydroxide anion(basic) H3O+ hydronium cation(acidic) OH. Hydroxal radical O2H. hydroperoxy radical All of them allow divers(prenominal) properties because they have different composition. Elements, Compounds and variety shows- How umpteen elements? 118 elements that atomic number 18 cognise only 114 are named... 13 15 17 18 have no name Elements integrate to form complexs. How many chemical compounds? 68.3 million known or 68.3 x 10^6 or 68300000 nucleus| splendid or alloy| Element or compound| gentleman or hetro| aluminum| Pure | Element| self-coloured| orchard apple tree Juice| Mixture| Mixture of Compound | Heterogeneous| H2O2 liquidness| Pure| Compound| homogeneous|...If you want to get a full essay, order it on our website: Ordercustompaper.com

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