Which statement justifies that phosphine (ph3) is a polar molecule?

the p-h bond is nonpolar and the molecule is asymmetric.
the p-h bond is nonpolar and the molecule is symmetric.
the p-h bond is polar and the molecule is asymmetric.
the p-h bond is polar and the molecule is symmetric.
the p-h bond is polar and the charges are distributed e

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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