Question

A quiz contest was being held in the school for chemistry students. The quiz-master said: An element has the
electronic configuration 2, 8,2
(a) What is the atomic number of this element?
(b) Is it a metal, non-metal or metalloid?
(c) Which of the elements Mg, O, P or Ar shows similarity with this element?
(d) We use a compound of this element in our food. Identify that compound.
(e) A compound of this element causes hardness of water. Identify that compound.​

Answer 1

Answer:

a) Atomic number is 12

b) This in a metal

c) Mg shows similarity with this element

d) Milk of Magnesia used for treating acidity

e) Magnesium Salt cause hardness of water

Answer 2

The element is Mg.

1. The atomic number of the element is 2+8+2=12.
2. The element is Mg and it is an alkaline earth metal.
3. Mg shows similarity with this element.
4. Milk of magnesia which is a compound of Mg is generally used in food to prevent acidity.
5. The magnesium chloride causes hardness in water.