It would be 9*10 to the -3
All of these are compounds except oxygen because a compound is two or more different elements bonded together.
Physical science, is the study of the composition, structure, properties and change of matter.[1][2] Chemistry is chiefly concerned with atoms and their interactions with other atoms - for example, [ the properties of the chemical bonds formed between atoms to create chemical compounds. As well as this, interactions including atoms and other phenomena - electrons and various forms of energy—are
The answer to this question would be C
