Tag: introduction to non-metals

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Multiple choice chemistry metals and non metals introduction to non-metals occurence of metals occurrence of metals and non metals

State whether true or false :

All the elements having one electron in their outermost shell are metals.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen has one electron in its outermost shell with electronic configuration of $1s^1$ but it is a non-metal. therefore all elements having one electron in their outermost shell are not metals. Hydrogen is an exception.


 Therefore, option B is correct.

Multiple choice chemistry metals and non metals introduction to non-metals occurence of metals occurrence of metals and non metals

The most abundant metal in the earth's crust is :

  1. Oxygen

  2. Aluminium

  3. Calcium

  4. Gold
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Percent abundance of given elements in the earth's crust are :


Oxygen - 46.6%
Aluminium - 8.1%
calcium-3.63%
gold-0.0011%

But oxygen is a non-metal and aluminium, calcium and gold are metals. 

Therefore, Aluminium is the most abundant metal in the earth's crust.

Therefore, option B is correct.

Multiple choice chemistry metals and non metals introduction to non-metals occurence of metals occurrence of metals and non metals

The second most abundant metal present in the crust of the earth is :

  1. $Ca$
  2. $Al$
  3. $Cu$
  4. $Fe$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Iron is the second most abundant metal in the earths crust. It is found in the molten form inside the crust of the earth. In the presence of air and moisture it forms its oxide but the alloy of steel is widely used as pipes,it is unreactive in nature.