Chemistry: The Science in Context (4th Edition)

The alkaline earth metals are in group 2 of the periodic table. Option (a) is incorrect. Sodium (Na) is an alkali metal in group 1 of the periodic table. Option (c) is incorrect. Xenon (Xe) is a noble gas in group 18. Option (d) is incorrect. Hydrogen (H$_{2}$) is in group 1. Option (b) is correct. Calcium (Ca) is an alkaline earth metal in group 2 of the periodic table.