Around The Sun

atomic system and yearly Table Elements An section is a key substance that apprisenot be busted vote down by chemic means to simplier substances. An element consists in all of atoms. E.g. H, He, O i.e. all the elements in the Periodic Table. Compounds A mixed is a substance chill out of elements combined in a fixed proportions. Compounds can set ahead be broken down into simple units by chemic substance means. E.g. 2 weewee supply (l) ? 2H2(g) + O2(g) Mixtures A garland is a combination of 2 or more substances in which the substances retain their identity. A compartmentalisation can be apart(p) by physical means. E.g. send ? H2(l) + O2(l) Symbols of the elements H, He, Li, Be, B, C , N, O, F, Ne, etc.. Given that we engage various elements and that they fork over different properties and characteristics, e.g. He, S, Fe, what is the amount-go of the difference between onw element with an another? Atomic theory of Matter All matter consists of minute, undividable particles called atoms which combine unitedly in various ways. E.g. water, O2, CaCO3 Daltons Atomic Theory 1. Matter is quiet of indivisible particles called atoms. 2. Atoms of the kindred element have the alike(p) physical and chemical properties. 3. Atoms of different elements have different weights ( smokestackes) 4. Chemical compounds are tranquil of 2 or more different atoms joined unitedly in simple, fixed ratios.

The rightfulness of Conservation of Mass In a chemical change, pack is maintain (Total mass of reactants = Total mass of products) E.g FeS ? Fe + S 87.8g 55.8 32g reactant (87.8g products) The jurisprudence of Constant Composition The alike compound, no matter how it is prepared, always contains the same elements combined in the same fixed proportion by mass. E.g.2H2 + O2 ? 2 urine % H in H2O = 11.2 % O in H2O = 88.8 Chemical Formulas...If you want to outwit a full essay, auberge it on our website: Orderessay

If you want to get a full information about our service, visit our page: How it works.