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How many flowers are there if all of them are roses except two, all of them are tulips except two and all of them are daisies except two?
How many flowers are there if all of them are roses except two , all of them are tulips except two and all of them are daisies except two?
In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be
Atoms with same number of neutrons, but different number of nucleons are called
Atoms having the same number of protons but different number of neutrons are called :
Neutrons have mass approximately equal to that of __________ atoms.
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
We work every day except Friday. What part of speech is 'except?
The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?
There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?