ARCH-C-15: Periodic Table Trends (Groups 1, 17, 18), Metal Reactivity Displacement & Extraction Series

Evaluate each statement: Statement 1 is correct (Group 1 metals lose $1$ electron; larger atomic radius and increased inner-shell shielding make electron loss easier down the group). Statement 2 is correct (Group 17 halogens gain $1$ electron; larger radius and increased shielding weaken attraction for an incoming electron down the group). Statement 3 is correct (metallic bonding weakens down Group 1, so $\text{mp/bp}$ decrease). Statement 4 is false (intermolecular forces between $\text{X}_2$ molecules strengthen down Group 17 as molecular size increases, so $\text{mp/bp}$ increase from $\text{F}_2\text{(g)}$ to $\text{I}_2\text{(s)}$). Thus 1, 2 and 3 only are correct (~95s).