Atomic radius (pm) of Al, Si, N and F respectively is

Atomic radius of Be,O,C,N,B are respectively (in "pm" ):

The C - C and Si - C interatomic distances are 154 pm and 188 pm respectively. The atomic radius of Si is

11, 12, 13 and 14 are the atomic numbers of the elements Na, Mg, Al and Si respectively. Which element have more atomic radius ?

The atomic radius of F, Br, and I are 64, 114, and 138 pm respectively. From this information (and not your book) estimate a reasonable atomic radius of Cl.

A student reported the radii of 'Al^(3+), Mg^(2+)' and 'F' as '136 pm, 65 pm' and '50 pm' respectively. Is the order correct? Comment.

A student reported the radii of Al ^(3+), Mg^(2+), and F ^(-) as 136 pm, 65 pm and 50 pm respectively. Is the order correct ? Comment.

Be forms Be^(2+) and Al^(3+) forms Al^(3+) . If the radii of Be^(2+) and Al^(3+) are respectively 31 and 53.5pm, show that their polarisation abilities are same.

Atomic radius of hydrogen is 37 pm. Express the same in metres.