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The properties of compound are different from its constituent elements. Water which is a compound of oxygen and hydrogen has property to extinguish fire though its constituent elements do not...
1 Answers 1 views(a) Yes. The atoms of all the three elements lithium, sodium, and potassium have one electron in their outermost shells. (b) Both helium (He) and neon (Ne) have filled outermost shells....
1 Answers 1 viewsFor hydrogen like atom. En \(\propto\) -\(\frac{Ƶ^2}{n^2}\) En = -k\(\frac{Ƶ^2}{n^2}\) for hydrogen atom- E4 = -k\(\frac{(1)^2}{4^2}\) E4 = \(\frac{-k}{16}\) given, E4 = € \(\because\) k = -€ x 16----(1) For Li+2 E1 = \(-\frac{k(3)^2}{1^2}\) = -k x 9 using equation (1) we get E1 = € x 16 x 9 E1 = 144 €
1 Answers 1 viewsHydrogen can be considered a cleaner fuel because its burning produces water vapour which is non-polluting. However, due to explosive nature of hydrogen, its storage and transportation is difficult
1 Answers 1 viewsLithium (1+) has a relatively small charge density (as it is quite large, and low charge), and that Iodine is large and has a high charge. So according to Fajans...
1 Answers 1 viewsAtomic hydrogen atoms are produced by the dissociation of dihydrogen with the help of an electric arc. This releases a huge amount of energy (435.88 kJ mol–1 ). This energy...
1 Answers 1 viewsDeuterium and tritium. The importance of heavier isotopes of hydrogen is in nuclear reactor.
1 Answers 1 views(d) iodine in alcohol
1 Answers 2 views(i) A yellow precipitate of lead iodide (PbI2) is formed. (ii) Precipitation reaction/Double displacement reaction. (iii) Pb(NO3)2(aq) + 2KI(aq) ------> PbI2(s) + 2KNO3 (aq) Lead nitrate Potassium iodide Lead iodide Potassium nitrate ...
1 Answers 1 views