Which of the following statements relating to the Modern Periodic Table is/are correct? 1. The atomic radius increases on moving from left to right across a period. 2. Germanium, Tellurium, and Copper are transition metals. 3. The two isotopes of Chlorine occupy the same position in the periodic table. 4. The metallic property of Ca, Ba, Be and Sr follows the order: Be < Ca < Sr < Ba.

Statement 1 is incorrect: atomic radius DECREASES across a period (left to right) due to increasing nuclear charge. Statement 2 is incorrect: Germanium is a metalloid and Tellurium is a metalloid; only Copper is a transition metal. Statement 3 is correct: isotopes (Cl-35 and Cl-37) have the same atomic number and therefore occupy the same position in the periodic table. Statement 4 is correct: metallic character increases down a group, so among Group 2 elements Be < Ca < Sr < Ba. Hence statements 3 and 4 are correct.