17Giant Structures Metallic BondingHard1 mark
For Groups 1 and 2, metallic bonding is stronger in metals that have a smaller atomic radius.
X and Y are both metals.
is the energy required to produce 1.0 mol of gaseous atoms from the solid.
kJ mol; kJ mol
What are X and Y?
| X | Y | |
|---|---|---|
| A | Na | K |
| B | Na | Mg |
| C | Mg | Na |
| D | Mg | K |