Altaria is a dragon and flying type, so:
4x: ice (both dragon and flying types are weak)
2x: dragon (weakness of dragon type) and rock (weakness of flying type)
Note dragon types are resistant to electric attacks so it will not be super effective.
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Ice is Altaria's greatest weakness. It is a Dragon/Flying type and Ice is super effective to both.
Ice
Water and Grass attacks are super effective against Onix.
Ghost & Flying. I believe that's it! Not dark or bug because although they're super-effective against Psychic, they are not-effective against Fighting. And not Psychic, because though it's super-effective against Fighting, it's not-effective against Psychic.
super effective is bug