Question
Which of the following statement regarding Rutherford
nuclear model is NOT correct?Solution
RUTHERFORD’S MODEL OF AN ATOM Rutherford was interested in knowing how the electrons are arranged within an atom. Rutherford designed an experiment for this. In this experiment, fast-moving alpha (α)-particles were made to fall on a thin gold foil. There is a positively charged center in an atom called the nucleus. Nearly all the mass of an atom resides in the nucleus. The electrons revolve around the nucleus in circular paths. The size of the nucleus is very small as compared to the size of the atom.
The ratio of the present age of 'E' to that of 'F' is 2:3. If six years hence, the ratio of their ages will become 3:4, find the sum of their ages, five...
P says to Q “I am four times as old as you were when I was as old as you are”. The difference between their ages is 15 years. Find the sum o...
Present age of ‘K’ is 70% more than that of ‘L’. 10 years ago, ‘K’ was 2.2 times as old as ‘L’. Find the present age of ‘L’.
...The ratio of the present age of 'I' to that of 'J' is 7:9. If eight years hence, the ratio of their ages will become 9:11, find the sum of their ages, e...
A’s age is 120% of what he was 4 years ago, But 60% of what it will be after 4 years. What is his present age?
The ratio of age of ‘B’ after 6 years from now and age of ‘C’ 4 years ago from now is 7:4, respectively. The present age of ‘C’ is 40% of th...
- Two years ago, the age ratio of 'D' and 'E' was 7:9. In ten years from now, their age ratio will be 9:11. Find the present age of 'K', who is 3 years young...
The current ages of individuals 'A', 'B', and 'C' are in the proportion 7:2:3. Eight years prior, the average age of the three was 28 years. Determine t...
When 15 years is subtracted from the present age of A and the obtained result is divided by 4, then the present age of his nephew is obtained. If the pr...
A father is three times as old as his son. After 5 years, the father’s age will be twice that of his son. What are their current ages?
