Question

Name the metal which reacts both
Water and hot water and the vapour to form by doing
igas
quish cold​

Answer 1

Explanation:

Magnesium has almost no reaction with cold water. It reacts very slowly with hot water.  It reacts with steam when being heated and gives hydrogen gas and metal oxide.

Magnesium + Water →  Magnesium hydroxide + Hydrogen gas

Zinc and iron do not react with cold or hot water.  They react with  steam slowly to give the respective oxides:

Zinc + Steam →  Zinc oxide  + Hydrogen gas

Iron + Steam → Iron(II) iron(III) oxide  + Hydrogen gas

Answer 2

Answer:

Calcium (Ca) It reacts slowly with cold water. Magnesium (Mg) It reacts very slowly with hot water. It reacts with steam when being heated and gives hydrogen gas and metal oxide. Potassium melts to a silvery ball, moves quickly on the water surface with a hissing sound, and burns with a lilac (淡紫色) flame.

Elements: Potassium; Sodium; Calcium

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