What is the structural formula for #PH_3#?

Answer 1

The structural formula is how the molecule is actually drawn out, but this is a fairly simple molecule.

In the case of #"PH"_3#, you know that hydrogen only has one electron, and so it can only make a maximum of one single bond (most of the time).

Therefore, phosphorus (#"P"#) must be the central atom, and you just draw hydrogen atoms around it. Phosphorus is right below nitrogen, so it has the same number of valence electrons as nitrogen.

As a result, #"PH"_3# (phosphorus trihydride) and #"NH"_3# (ammonia) are isoelectronic (same number of electrons, or similar electronic structure), and they have the same molecular geometry as well:

(bond angles approximately to scale.)

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Answer 2

PH₃ has a trigonal pyramidal structural formula, where three hydrogen atoms (H) and one phosphorus atom (P) are bonded.

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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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