Which sample is a pure substance?
a test tube of zinc oxide
a container of zinc and oxygen
a flask of pond water
a jar of soil

|using the periodic tablewarm-upuse the periodic table in the tools bar to answer the following questions. what elemental classification does oxygen belongto? done

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Which subshell is represented by the actinides family?