What is the oxidation number for each element in Al4(SiO4)3?

The oxidation number for each element in Al4(SiO4)3 is determined as follows:

1. Aluminum (Al): The oxidation number of Aluminum in its compounds is usually +3. So, in Al4(SiO4)3, the oxidation number of Al is +3.

2. Silicon (Si): Silicon is a member of group 14 on the periodic table. Its oxidation state in most compounds is +4. So, in Al4(SiO4)3, the oxidation number of Si is +4.

3. Oxygen (O): The oxidation number of Oxygen in its compounds is usually -2, except in peroxides where it is -1. So, in Al4(SiO4)3, the oxidation number of O is -2.

So, the oxidation numbers are Al: +3, Si: +4, and O: -2.