← Chemistry (0620)
Q1 / 5
Metallic bonding
Higher
2 marks
Why does the strength of metallic bonding increase across Period 3 (Na → Al)?
A
More delocalised electrons per atom (Na:1, Mg:2, Al:3) and higher ion charge → stronger metal bonding
B
Atomic radius increases across period 3, weakening bonds
C
Period 3 elements all have the same metallic bond strength
D
Na has the strongest metallic bonds because it is first in the period
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