1st place

. You write a letter to the Editor of this newspaper expressing your appreciation for the right step being taken by the Pollution Control Board. Write this letter. Answer: 21, 11th cross 1st Block, Rajajinagar Bangalore The Editor The Times of India M.G. Road Bangalore 21st..

. They consist of metals. 7. The Zero group consists of 'Noble gases'. 8. There are 7 horizontal rows in the periodic table. These are called the periods. 9. In a period, the number of valence shell remains the same for all elements. However, the number of electrons in the valence shell increases f..

The 6 th period consists of elements that have atomic numbers 58 to 71. They are called Lanthanides. The 7 th period consists of elements that have atomic numbers 90 to 105. They are called Actinides. Both of them are called inner transition elements. Lanthanides and actinides are not accommodat..