Atoms of which two elements in the ground state contain the same number of valence electrons
a- al & si
b- al & b
c- al & zn
d- al & ge

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid

Chromosome 17 is made of over million base pairs.