1.

The atomic numbers of the elements X, Y and Z are 2, 10 and 16, respectively. Identify the element which does not exist in monoatomic state.

Answer»

X
Z
Y
X and Y

Solution :`{:("ELEMENT",X,Y,Z),("Valence SHELL",K,L,M),(,(1),(2),(3)),("Number of valence",,,),("electrons",2,8,6),("Element","He","Ne","S"):}`
SULPHUR ( S)doesn ' t exist in monoatomic state due to its greater chemical reactivity.


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