Hydrogen S block element
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Last updated 8:11 PM on 6/23/25
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7 Terms
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Hydrogen was discovered by _______
The by the addition of ____ to ____
Reaction _____________
Henry Cavendish 1766
HCl to Zinc
HCl (aq) + Zn (s) → ZnCl2 (aq) + H2 (g)
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Hydrogen fuel
H2 (g) + O2 (gas) → H2O
H2 gas boiling point?
Ideal fuel
Highly negative delta H (enthalpy) = exothermic and release of heat.
Bp= - 253 C (20K)
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Hydrogen
What block?
Solid liquid or gas?
Does it react with H2O?
Alkali metal?
S block
Gas
Not reactive with H2O
No far more electronegative than alkali metals in S block
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Electrolysis of H2O
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7
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Note 
Flashcards (150)