Question
Protons are discovered
bySolution
In 1911 Ernest Rutherford who performed many experiments to explore radioactivity did an experiment in which he discovered that the atom must have a concentrated positive centre charge that contains most of the atom’s mass. He suggested that the nucleus contained a particle with a positive charge the proton .
Find the unit digit of the expression: 7! + 8! + 9! + 10! + ........ + 500!.
The difference between a number and its three fifth is 50. What is the number?
If a number is decreased by 8 and divided by 12, the result is 16. What would be the result if 10 is subtracted from the number and then it is divided ...
Two students appeared in an exam and one secured 18 marks more than the other. If marks of the student who got more marks is 58% of the sum of the marks...
Find remainder when 7¹⁰⁰ is divided by 100.
If the sum of two numbers is 45, and their difference is 9, what are the two numbers?
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Which of the following is a Prime Number?
- A number is 2/5 more than 33 times its reciprocal. What is the number?
