Hydrogen combines directly with:
Correct answer: A. Ca
- A. Ca
- B. Cu
- C. Zn
- D. Fe
Explanation
Hydrogen reacts directly with highly reactive metals, such as the alkali and most alkaline earth metals, to form ionic (saline) hydrides. It will react directly with calcium (Ca) upon heating to form calcium hydride (CaH₂).
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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