Arrange these metals in order of their reactivity with water or steam:Mg, K, Ca, Na. Start with the most reactive:
Correct answer: C. K, Na, Ca, Mg
- A. Ca, Mg, K, Na
- B. Ca, K, Na, Mg
- C. K, Na, Ca, Mg
- D. Mg, K, Na, Ca
Explanation
Option C is correct because it arranges the metals in order of their reactivity with water or steam, starting with the most reactive.The correct order of reactivity from most reactive to least reactive is:1. K (Potassium)2. Na (Sodium)3. Ca (Calcium)4. Mg (Magnesium)This is because metals become more reactive as you go down Group 1 of the periodic table. So, potassium (K) is the most reactive with water, followed by sodium (Na), calcium (Ca), and finally magnesium (Mg) which is the least reactive in this list.
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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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