Noble Gases the elements within a group usually have simillar propeties The

Noble gases the elements within a group usually have

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Noble Gases , the elements within a group usually have simillar propeties The group 8A elements, called nobel gases are mostly unreactive The most familiar noble gas is probable helium, used to fill balloons Other nobles gasses are neon ( often used in electronic signs), argon ( a small component of out atmosphere), kyrpton, xenon and radon Alkali metals lose one elctron and form 1+ ions
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Alkaline Earth metals lose 2 elctrons and form 2+ions Halogen gain one elctron and form 1- ions Chalcogen (oxygen fam nonmetals) gain 2 electron and form 2- ions Oxidation - reduction Lose Gain electrons Cation (+) anion (-) Oxidation Ca(S) → Ca^2+ (S) + 2e- Oxidation because it is gaining Reduction Ca^2+ (S) + 2e- → Ca(S) Reduction because it is loosing Br- N^3 - Al ^3+ WHEN IT SAY 3+ THAT MEANS (-3) AND WHEN IT SAYS 3- THAT MEANS (+3) .
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Solubility Rule NiS → (H2O) → insoluble Mg3 (PO4)2 → (H2O) → insoluble - If not on solubility chart then it is insoluble LiCO3 → (H2O) → soluble NH4 Cl → (h2O) → soluble
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