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Please explain why aluminium has a higher melting point than sodium?

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When a substance melts, some of the attractive forces holding the particles together are broken or loosened so that the particles can move freely around each other but are still close togetherThe stronger these forces are, the more energy is needed to overcome them and the higher the melting temperatureSodium and aluminium are all metalsThey have metallic bonding, in which positive metal ions are attracted to delocalised electronsGoing from sodium to aluminium: the charge on the metal ions increases from +1 to +2 Sodium loses an electron to become positively charged +1 Magnesium loses 2 electron to become positively charged +2 As a result , the number of delocalised electrons increases so the strength of the metallic bonding increases and the melting points and boiling points increase

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