Solution:
The mass number of an atom is equal to the number of nucleons.

Solution:
The Chernobyl accident in 1986 was the result of a flawed reactor design that was operated with inadequately trained personnel. The resulting steam explosion and fires released at least 5% of the radioactive reactor core into the environment, with the deposition of radioactive materials in many parts of Europe.

Solution:
Polystyrene is an synthetic aromatic polymer made from the monomer styrene, a liquid petrochemical.

Solution:
Spin quantum number is the is the fourth quantum number that differentiates two electrons in the same orbital. The Pauli exclusion principle states that “no two electrons in an atom can have the same four quantum numbers. This means that no two electrons can have the same state in an atom. Each electron must have a different spin or occupy a different shell from any other.

Solution:
An emulsion of sodium thiosulfate is called hypo by photographers. It is used to stop development of exposed film. Thiosulfate converts undeveloped silver bromide grains in the film into water-soluble silver thiosulfate complexes that can be removed when the film is washed.

Solution:
Natural Rubber is a Polymer derived from Isoprene.

Solution:
Global warming may result in flood, cyclone and decrease in forest productivity.