which Element with least boiling and melting point in the periodic table?

Q. which Element with least boiling and melting point in the periodic table?

A

Helium

B

Fluorine

C

Francium

D

Caesium

Solution:

Most electro possitive stable element(stable) -Caesium(Cs) .
4 Most number of isotopes-Tin(Sn)-10 Isotopes
Least number of isotopes-Hydrogen-3 Isotopes.
Element with least boiling and melting point-Helium (He)
Element having higher electro negativity -Fluorine(F).
Element having higher electro positivity(unstable)-Francium(Fr).

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