To tell if SO3 (Sulfur trioxide) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that S is a non-metal and O is a non-metal. When we have a non-metal and a non-metal the compound is usually considered covalent.
Because we have a non-metal and non-metal in SO3 there will be a difference in electronegativity between S and O is less than 2.0. This difference results in an electron(s) being shared between the non-metals. The sharing means that the bond will be considered covalent/molecular.
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Helpful Resources
Metals, Non-Metals on the P- Table: [ Ссылка ]
Ionic, Covalent, & Polar Covalent: [ Ссылка ]
Electronegativity for each element: [ Ссылка ]
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Because we have a combination of a non-metal and non-metal SO3 (Sulfur trioxide) is considered an covalent/molecular compound.
In general, covalent compounds compounds:
- have low melting points and boiling points.
- have low enthalpies of fusion and vaporization.
- do not conduct electricity when dissolved in water.
For more chemistry help, see [ Ссылка ].
Is SO3 (Sulfur trioxide) Ionic or Covalent/Molecular?
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