How do you spell "wrong"?
Being a native speaker of Russian, you need to know how to spell "wrong." In Russian, both the fluent and separate spelling of this word are allowed, depending on the context.
An adverb "wrong" is the same as other adverbs in Russian with the prefix "not", which end in "-o", is written together, if the particle "not" gives the adverb the opposite meaning, but the resulting word can be replaced with a synonym, not having a negative prefix. For example: wrong - wrong (syn.).
An adverb is “not correctly” written separately, if the sentence implies or is opposed to the union “a”. For example: the article was not written correctly, but distorted. Also, this adverb is written separately with "not", if it is preceded by such words: not at all, not at all, not at all, not at all, etc.