Question

Write the electronic configuration of the following elements:
1. A non metal which is used in the lead of pencil
2. The most abundant element in the universe.
3. A most abundant metal on the earth
4. An element which is used in making of the tip of
matchsticks.
5. An element which supports life.

Answer 1

Answer:

Chromium (Z=24) contains five electrons in 3d subshell.

(b) Magnesium (Z=12), an alkaline earth metal, can readily lose two electrons to form Mg

2+

.

(c) Oxygen (Z=8) gains 2 electrons to form O

2−

.

(d) Halogens (goup 17) contains metal (iodine), non metals (F,Cl and Br), liquid bromine and gases.

Explanation:

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Answer 2

Explanation:

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