Q. 65.0( 4 Votes )
Write two elements for each of the following: i. Alkali metals, ii. Noble gases.
(i) Group 1 elements are called alkali metals so alkali metals are Lithium (Li) and Sodium (Na).
(ii) Group 18 elements are called noble gases so noble gases are Helium (He) and Argon (Ar).
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Account for the following:
a. Cations are smaller in size than the corresponding atom.
b. The noble gases were discovered very late.Xam idea - Science
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