Which one of the following indicates the correct order of atomic size? (1). C gt F gt Ne""(2) Be lt C lt F lt Ne (3). Be gt C gt F" "(4) F gt Ne gt Be gt C

Which one of the following indicates the correct order of atomic size?

1.	Which one of the following indicates the correct order of atomic size? (1). C gt F gt Ne""(2) Be lt C lt F lt Ne (3). Be gt C gt F" "(4) F gt Ne gt Be gt C
Answer» Solution :Be, C and F are the elements of same PERIOD (2ND period) hence, `Be gt C gt F.` But Ne is an INERT gas, whose Van der Waals RADII is exceptionally high, hence, `Ne gt Be gt C gt F`