Question

Why alkali metals are bigger in size than noble gases

Answer 1

Answer:

I hope you understand with my answer thanks..

Answer 2

Alkali metals are bigger in size than noble gases because alkali metals have more atomic radius than noble gas in the periodic table moving from left to right.

Explanation:

Atomic radius of the elements in the periodic table is the distance between the nucleus ( center most part of an atom ) and the outmost shell of an atom.

Atom is the smallest unit of element showing the  element's original properties.

In the periodic table atomic size increases from right to left and bottom to top and therefore the noble gases (inert gases) are present right side in the periodic table with smaller atomic radii and these are also least reactive and having full shell of valence electrons.

Group 1 is of alkali metals whereas Group 18 is of noble gases residing at the two opposite sides of periodic table with opposite chemical properties.