Related Questions

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
A Greater than 1.0
B Less than 1.0
C Equal to zero
D Equal to 1.0
Neutrons are present in all atoms except that of
A He
B C
C H
D Ar
Atoms with same number of neutrons, but different number of nucleons are called
A Isotones
B Isobars
C Isotopes
D Isoters
Atoms having the same number of protons but different number of neutrons are called :
A Isotopes
B Cations
C Higgs-boson
D Anions
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
A Isomers
B Isotopes
C Isobars
D Isotones
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
A Humidity ratio
B Relative humidity
C Absolute humidity
D Degree of saturation
There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?
A 22
B 7
C 37
D 15
Out of the following, nucleus of __________ atom contains the largest number of neutrons.
A U-235
B U-238
C U-239
D Pu-239
Nucleus of tritium has __________ neutrons.
A 1
B 2
C 3
D 5
A moderator __________ the neutrons.
A Slows down
B Absorbs
C Accelerates
D Reflects

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