A. Atomic Radius: the distance from the center of the nucleus to the outer most electrons in an atom Inc/dec as you move across a row (left to right) on the periodic table

Inc/dec as you move down a family (top to bottom) on the periodic table

B Ionic Radius: the distance from the center of the nucleus to the outer most electrons in an ion

Cations: loses/gains outer electrons, are _smaller/larger than the atom it forms from

Anions: loses/gains electrons, are _ smaller/larger than the atom it forms from

1. Which atom in each pair has the LARGER atomic radius? Write the symbol

a. Li or K e. Cl or Br

b. Ca or Ni f. Be or Ba

c. Ga or B g. Si or S

d. O or C h. Fe or Au

2. Rank each of the following in order of INCREASING atomic radius

a. F, K, Br <<
b. Os, Ni, Fe <<

3. Rank each of the following in order of DECREASING atomic radius

a. Cl, Br, Ga >>
b. Ca, Rb, C >>

4. Which ion in each pair has the SMALLER atomic radius?

a. K+ or O2- d. K+ or Cs+

b. Ba2+ or I- e. F- or S2-

c. Al3+ or P3- g. Fe2+ or Fe3+