You should always study. you can be above your class. thats what i do.. search google for ur course. they can tell u some key points for it. u should even study what you know and want to know as well.
Answer:
The electron configuration is [HE] 2s1
Explanation:
2Mg⁺ 2HNO₃ = Mg(NO₃)₂ + H₂