Question

Which of the following diagrams represent diatomic

molecules, polyatomic molecules, molecules that are

not compounds, molecules that are compounds, or an

elemental form of the substance?​

Answer 1

Answer:

b elemental form of the substance .

Answer 2

Diatomic molecules : it is a molecule having 2  atoms.

                              Diagram a has a molecule having 2 atoms .

Polyatomic molecules: it is molecule having more than 2  atoms.

                               Diagram b and c has a molecule having more than 2 atom.  

molecules that are  not compounds : A compound is made up of many identical molecules wherein each molecule consists of 2 or more different atoms.

Diagram c do not have molecules containing different atoms therefore it is not a compound.

Diagram a and b have molecules  containing different atoms therefore they are compound.