Question

Na, Mg, Si*, AN
Q.10 Describe a) He2 is not found to exist in nature b) N+2
is not diamagnetic substance​

Answer 1

Answer:

A . Based on molecular orbital theory, He2 should not exist, and a chemical bond cannot form between the atoms. However, the van der Waals force exists between helium atoms as shown by the existence of liquid helium, and at a certain range of distances between atoms the attraction exceeds the repulsion.

Chemical formula: He2

Molar mass: 8.0052 g/mol

CAS Number: 12184-98-4

Explanation:

B . Incontrast, Molecular nitrogen, N2, however, has no unpaired electrons and it is diamagnetic (this concept is discussed below); it is therefore unaffected by the magnet. There are some exceptions to the paramagnetism rule; these concern some transition metals, in which the unpaired electron is not in a d-orbital.