Moseley's Modern periodic law According to Moseley's Modern periodic law, Elements are Arranged in a Tabular form based on their Atomic Numbers. it states that the Chemical and Physical Properties of Elements is a Periodic Function of their Atomic Number. Newland Newland arranged the Elements in the Order of Increasing Atomic Masses and found that the Properties of Every 8th Element are Similar to that of the 1st Element, Just like musical notes. Mendeleev Mendeleev arranged the Elements in the Increasing Order of their Atomic Mass. Mendeleev's Periodic table is based on the Chemical Properties of the Elements. It contains 7 Periods(horizontal rows) and 8 Groups (vertical columns). Share on Whatsapp
The ages of A, B and C together are 42 years. B is twice as old as A and C is 2 years older than A. What is the difference between ages of B and C?
The current age of 'Aman' is 87.5% greater than 'Bittu's' age. The ratio of Aman's age 3 years hence from now to Bittu's age 6 years hence from now is 8...
Eight years ago, the ratio of the ages of Chahal and Rayudu was 5:7. In 16 years, the ratio of their ages will be 11:13. Calculate the average of their...
In a family of four, the average age of Anu, Ben, Carla, and Dan is 28 years. The ratio of Carla's to Eva's present ages is 5:6, and Ben's age is 20% le...
The ratio of the ages of A and B is 3:5. After 5 years, the ratio will be 7:11. Find the present age of B.
The ratio of the present age of mother and son is 11:5. 5-years ago the father's age was 5 years less than thrice the age of son and 6 years hence the a...
Present ages of P and Q are in the ratio 2:3 respectively. If Q’s age, 8 years hence from now will be 2 times of P’s age, 6 years ago from now, then...
The present age of A is double of B's present age. C's present age is 3/5th of A's present age. Average age of A, B and C is 28 yrs. Find the present ag...
Mukesh's age is four times his son's age If, after 8 years, Mukesh will be four times his son's age, how many times his son's age will Mukesh be after a...
Sum of the present ages of A, B, C and D is 60 years. After 6 years ratio of their ages is 6:5:5:4. What is C’s present age?
