Question

How do you appreciate the role of Moseley for the position of hydrogen in
periodic table​

Answer 1

Answer:

So if you glance at the periodic table, you will see hydrogen is the first element in the table. It is the smallest element on the table. It has atomic number one, which means it has only one electron orbiting it its shell. In fact, Hydrogen has only one shell. It is also the lightest element on the periodic table.

Now we know that the position of elements on the periodic table largely depends on their electronic configuration. Hydrogen has the electronic configuration of 1. It can get rid of one electron to attain noble gas configuration. This characteristic of hydrogen matches those of alkali metals. But they hydrogen atoms can also gain one electron similar to halogens. Let us see how this plays out.

Position of Hydrogen

Answer 2

Answer:

Forests influence the quality of air, soil and water, natural resources in the following ways :

(i) Air - Forests have large number of trees, shrubs and herbs. They take in CO2 and give out oxygen during photosynthesis in daylight. Thus, they maintain the concentration of oxygen and carbon-dioxide in the atmosphere.

(ii) Soil - Forest tree and other plant roots bind the soil particles. They form a vegetation cover over the fertile top soil. Forest trees check the speed of running water and wind and thus protect the soil from erosion.

(iii) Water - Forest trees are large in number and give out enourmous amount of water during transpiration in the form of water vapour. The water vapour helps in the formation of clouds which on precipitation cause rain.