Questions

Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.

Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element and lithium is the least.

Russia is the Largest country of the World by Geographical Area.

Top 10 largest countries of the World :

1. Russia

2. Canada

3. United States of America

4. China

5. Brazil

6. Australia

7. India

8. Argentina

9. Kazakhstan

10. Algeria

When all 10 of the world's largest countries are taken together, they total 49% of the earth's entire 149 million square kilometres of land.

We know that, there are 7 continents in the world. They are :

Asia, Africa, Australia, North America, South America, Europe and Antarctica.

Africa - 53 countries

Asia - 48 countries

Europe - 45 countries

Antarctica - 0 countries

Hence, the continent Africa has most number of countries with 53 countries and in second place Asia has 48 , third Europe has 45 countries.

It takes 248 yrs for Pluto to orbit the Sun.