According to the VSEPR theory, a molecule with the molecular formula of #A_2# has what shape?

Answer 1

A molecule of this description must have a linear molecular geometry.

This is not actually due to valence shell electron pair repulsion (VSEPR), or "vesper", theory: in this molecule there would be only one region of electron density between the two atoms; notice the unusual turn of phrase since the covalent bond in this region could be a single bond (as in #"H"_2#), a double bond (as in #"O"_2#), or even a triple bond (as in #"N"_2#).

Consider a straight line inside a shape: no matter how much you change the angle of the shape, the original line remains unaffected. Similarly, a single region remains unaffected by the number of lone pairs on the various atoms.

This of course not only applies to molecules with a molecular formula of #"A"_2# but also those of #"AB"#, such as the cyanide ion (#"CN"^-#).

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Answer 2

Mateo Aguilar

According to the VSEPR theory, a molecule with the molecular formula of A2 has a linear shape.

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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.