The diagram shows two congruent regular polygons joined together. Not drawn
accurately
Work out the number of sides
of each polygon.
72
+
answer as ... sides

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

if i did my math right then the answer should but 108

7x7=4 so if u carry the 9 it will be 33