Question

1. Using only the periodic table arrange the following elements in order of increasing atomic radius: germanium, lead, tin, silicon
2. Using only the periodic table arrange the following elements in order of increasing atomic radius: thallium, lead, astatine, polonium

Answer 1

(1). Increasing order of atomic radius

$$Silicon\lt Germanium\lt Tin\lt Lead$$

(2). Increasing order of atomic radius

$$Astatine\lt Polonium\lt Lead\lt Thallium$$