in the space provided, write one sentance that identifies why this circuit allows electrical charges to flow.

This should help Come to the conclusion https://www.acaedu.net/cms/lib3/TX01001550/Centricity/Domain/389/5.6B%20Circuts%20and%20Electricity.pdf

A circuit may allow electrical charges to flow due to following conditions~

Closed circuitAll wires connected wellNo insulator in between the circuit pathWell capable BatterySwitch in ON positionIn case of electrolysis, the solution must release ions to conduct electricity

Hope this helps :)

If you’re referring to H vs H2,

H is usually found in ion form as H+

H2 is the designation for pure hydrogen gas, as it is diatomic and can only exist on its own in nature if it’s bonded to another H atom.

In this case, H is an ion and H2 is hydrogen gas

The way you wrote them out, though, indicates that they could be something different. Maybe isotopes? In this case the 1 and 2 are indicative of the amount of neutrons that the atom has.