Why does phosphorus have a low melting point?

Answer 1

#"White or yellow phosphorus"# has a melting point of #44.0# #""^@C#...

White phosphorus is molecular, i.e. we deal with discrete #P_4# tetrahedra. And molecular species should be reasonably volatile or low-melting in that the degree of intermolecular interaction is not substantial. On the other hand, there are several non-molecular allotropes of elemental phosphorus, the which have higher melting and boiling points.
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Answer 2

Because of its small atomic size and weak metallic bonding, phosphorus has a low melting point.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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