Consider the following properties of an element: (i) It is solid at room temperature. (ii) It easily forms an oxide when exposed to air. (iii) When it reacts with water, hydrogen gas evolves. (iv) It must be stored submerged in oil. Which element fits the above description the best

The options are not given, here are the options.

1.Sulfur.

2. Mercury.

3. Copper.

4. Sodium.

5. Magnesium.

The correct answer is sodium.

Explanation:

It is sodium because sodium is a chemical element with the symbol Na and it has atomic number 11. It is an akali metal, it is soft, slivery and does not occur free in nature.it is found in compound and group 1 on the periodic table. It is solid at room temperature. (ii) It easily forms an oxide when exposed to air. (iii) When it reacts with water, hydrogen gas evolves. (iv) It must be stored submerged in oil.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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