परमाणु की संरचना || Structure of Atoms || for 9th 10th 11th 12th NEEt IIT JEE

In a row of 21 girls, when Monika was shifted by four places towards the right, she became 12th from the left end. What was her earlier position from the right end of the row? 1) 9th 2) 10tth 3) 11th 4) 12th 5) 14th

8th , 9th and 10th pair of ribs

A hypothetical atom has energy levels uniformly separated by 1.2 eV. At a temperature of 2000 K, what is the ratio of the number of atoms in the 13th excited state to the number in the 11th excited state?

On what dates of April, 2001 did Wednesday fall? (a) 1st , 8th , 15th , 22nd , 29th (b) 2nd , 9th , 16th , 23rd , 30th (c) 3rd , 10th , 17th , 24th (d) 4th , 11th , 18th , 25th

The sum of 5th and 9th terms ofan AP is 72 and the sum of 7th and 12th terms is 97. Find the AP.

Find the 20th term of the AP whose 7th term is 24 less than the 11th term, first term being 12.

The sum of 5 th and 9 th term of an A.P.is 72 and the sum of 7 th and 12 th terms is 97. Find that