Answer:
Si4Br8
Step-by-step explanation:
The chemical names are formed with prefix and suffix with helps in the formation of chemical formula. Example of prefix are mono- means one, “di-” means two, and “tri-” is three" and suffix are "ide". Prefix represents the number of elements present in the compound and so help in formation of chemical formula.
The formula for Tetrasilicon octabromide is Si4Br8 as "tetra" used as prefix which represents that there are 4 element of silicon present in the compound and "octa" used as prefix in bromide represents that there are 8 element of bromide present in the compound.
Hence, the correct answer is "Si4Br8".