Elements
Trending Questions
Q. Which among the following is the most abundant element in the Earth's crust?
- Nitrogen
- Oxygen
- Carbon monoxide
- Carbon dioxide
Q. Who was the first scientist to define an element?
- Antoine Laurent Lavoisier
- J. J Thompson
- Ernest Rutherford
- Neils Bohr
Q.
Bromine is the only non-metal which is liquid at room temperature.
False
True
Q. Which among the following elements is liquid at room temperature?
- Carbon
- Sodium
- Nitrogen
- Bromine
Q. Who was the first scientist to use the term element?
- J.J Thompson
- Robert Boyle
- Antoine Laurent Lavoisier
- Neils Bohr
Q. The cardinal number of A={(x:x=5n, n∈W, n<4} is ___. [2 Marks]
Q. Given : P = {2, 4, 6, 8, 10, 12, 14, 16}. What can be said about the elements of the set P?
- All elements are even numbers.
- The elements form an odd number series
- The elements of P are at irregular intervals.
- All elements are Prime numbers.
Q. If the set A is defined as A = {x : x is a factor of 42 and is a prime number}. Then the number of elements in set A is ____ .
- 3
Q. The number of elements in the set {x : x is a letter of the word 'MISSISSIPPI'}, is ____ .
- 4
Q. If X = { 1, 3, 5, 7}, then n(X) = _________.
- 2
- 1
- 4
- 3