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Leviafan [203]
3 years ago
14

Polar or Nonglar? SO_3 SO_2

Chemistry
1 answer:
Evgesh-ka [11]3 years ago
4 0

Answer:

SO3 is a nonpolar molecule and SO2 is a polar molecule.

Explanation:

As can be seen in the attached, the SO3 molecule has a trigonal planar geometry. Each individual double bond of S=O is polar but the molecule has symmetrical geometry so the dipole momentums are canceled.

On the other hand, the SO2 molecule has a trigonal planar electron geometry but an angular molecular geometry due to the unbound electron pair. This unbound electron pair creates a total dipole momentum with negative density over the electron pair.

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Which atom in each pair has the larger atomic radius?
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Answer:

1. Potassium, K.

2. Calcium, Ca.

3. Gallium, Ga.

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6. Barium, Ba.

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8. Gold, Au.

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Atomic radius can be defined as a measure of the size (distance) of the atom of a chemical element such as hydrogen, oxygen, carbon, nitrogen etc, typically from the nucleus to the valence electrons. The atomic radius of a chemical element decreases across the periodic table, typically from alkali metals (group one elements such as hydrogen, lithium and sodium) to noble gases (group eight elements such as argon, helium and neon). Also, the atomic radius of a chemical element increases down each group of the periodic table, typically from top to bottom (column).

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8. Fe or Au: the atomic radius of iron is 156 pm while that of gold is 174 pm.

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