Hydrogen and s - block Elements — Flashcards

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Hydrogen has a unique position because it resembles both alkali metals (ns¹ configuration) and halogens (can gain one electron to form H⁻). However, it does not fully belong to any group, so it is pla…

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The three isotopes of hydrogen are: - Protium (¹H), mass number = 1 - Deuterium (²H or D), mass number = 2 - Tritium (³H or T), mass number = 3…

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Tritium (³H) is radioactive and emits low-energy beta particles with a half-life of 12.33 years.

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$$\mathrm{Zn(s)} + \mathrm{H_2SO_4(aq)} \longrightarrow \mathrm{ZnSO_4(aq)} + \mathrm{H_2(g)}$$ Zinc reacts with dilute sulfuric acid to produce zinc sulfate and dihydrogen gas.

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$$2\mathrm{H_2O(l)} \xrightarrow{\text{electrolysis}} 2\mathrm{H_2(g)} + \mathrm{O_2(g)}$$ Acidified or alkaline water is electrolyzed using platinum electrodes to produce hydrogen at the cathode and …

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Syngas is a mixture of CO and H₂. It is produced by passing steam over hydrocarbons or coke at high temperature in the presence of a nickel catalyst: $$\mathrm{CH_4(g)} + \mathrm{H_2O(g)} \xrightarrow…

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Hydrogen releases a large amount of energy on combustion (about three times more than petrol) and produces only water as a byproduct, making it a clean and efficient fuel for heavy rockets.

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$$2\mathrm{H_2(g)} + \mathrm{O_2(g)} \longrightarrow 2\mathrm{H_2O(g)}$$ Hydrogen burns in air with a pale blue flame to form water, releasing a large amount of heat.