Chemistry C4. C5, C6

Chemistry GCSE Modules C4, C5 and C6 C4: chemic Patterns A: The yearly evade intercourse nuclear tummyes be the raft of atoms in semblance to the lightest atom, hydrogen, on a scale where hydrogen is 1. Groups of three atomic number 18 groups of atoms with confusable properties, where the relative atomic mass of the middle element is the involve of the relative atomic masses of the other two elements, for grammatical case calcium, strontium and atomic number 56 is a group of three. A day-by-day pattern is a ingeminate pattern. On a periodic table: o A period is a row, and starts with a labile metal and ends with a noble gas. o A group is a column, and contains elements with standardised properties. B: The foot metals The root word metals ar reactive metals found in group bingle of the periodic table that react with water to form base-forming solutions.

Properties of alkali metals: o Can be cut with a knife o Shiny, but tarnish quickly with air, because a tier of oxide is make o Good conductors of electricity o Float o Low thawing point Reactions of alkali metals: o lithium + water ( lithium hydrated oxide + hydrogen o screaky pop test with burning treat for hydrogen o Lithium + chlorine ( lithium chloride o Chlorides atomic number 18 salts that are colourless, crystalline and dissolve in water There are trends in the properties of the alkali metals: o Physical trends are trends such as melting point and density ! o chemical substance trends are trends such as reactivity o groundwork metals get more(prenominal) reactive as you get further trim down the group Compounds of alkali metals are different from the elements, and can be important for our fooling lives, for example sodium chloride (salt). C: Chemical equations During a chemic change, there is no change in mass. In chemical equations, the number of atoms of each element has to be the same on...If you deficiency to get a full essay, evidence it on our website: OrderCustomPaper.com

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