what is a subscript in a chemical formula?what's the relationship between element and stom?我科学作业做不出~~~Science!还有几个问题：How to tell a substance is a compound or not a compound?How does the density make things sink of float

what is a subscript in a chemical formula?what's the relationship between element and stom?我科学作业做不出~~~Science!还有几个问题：How to tell a substance is a compound or not a compound?How does the density make things sink of float What is a family? what is a What is a doggy What is a fish? what letter is a What is a pensuasive What is a process? “subscript out of what we need is a What letter is a drink? What is a detective story? What letter is a drink? What letter is a drink What is a taxi driver? What letter is a question? What letter is a question? What is a good diet?