It is necessary to codemn unsafe structures if it posses a potential threat to the community. Ie: if the stucture is made of combustible materials and poses a fire threat to surrounding structures, which is generally a target for arsen.
Not necessary but it has happened before.
social structures provide a necessary framework for life. ;)
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Two equivalent Lewis structures are necessary to describe the bonding in O3. These structures involve adding a double bond between each pair of oxygen atoms in alternate arrangements.
This depends on the nature of this substance; precautions are necessary.
We have to strongly condemn his autocratic rule.The world leaders will strongly condemn any such attack.
Condemn is a verb.
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