ATOMIC RADIUS AND METALLIC PROPERTIES

ATOMIC RADIUS

Atomic Radius is basically how wide an atom is, therefore it increases across the periodic table. The more electrons the bigger the radius. The atomic radius of a chemical element is the measure of the size of its atom usually the distance from the nucleus. The atomic Radius is also called the covalent radius. It is half the distance between the two like atoms that are covalently bonded.

EXCERCISES!

get a piece of paper and your periodic table

1. What can you observe (in the atomic radius) when you look at one period ?
2. How about the metallic properties?
3. Arrange the different sets of elements by its atomic radius (increasing)

-Br,Ar, Mo, Na
-Re,Ne,Li,N
-Po,Ag, Be, I
-He, Y ,S,O,
4.Arrange the different sets of elements by its metallic properties (increasing)
-Be,H, B,I
-H, O,Ni, Lu
-Ti, Fr, Si,C
-K,Kr,Ru,Au