Which of the following is artificially produced as it does not occur in nature ?

Related Mcqs:

Primary purpose of a ____________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second?

A. Research B. Power C. Breeder D. Homogeneous...

Solar energy results from _______________ reaction?

A. Fission B. Combustion C. Thermonuclear D. None of these...

Sodium melts (at atmospheric pressure) at a temperature of ____________ °C?

A. 58 B. 98 C. 348 D. 588...

The atomic number of an element is equal to the number of ______________ present in its atom?

A. Neutrons B. Electrons C. Protons D. Either B. or C....

The new nucleus formed after β-decay of a radioactive element has___________________?

A. Less atomic number B. Less atomic weight C. More atomic number D. More atomic weight...