Classify each of the following pure substances as an element or a compound. a. silicon (si) chipb. oxygen (o2)c. hydrogen peroxide (h2o2)d. rust (fe2o3)e. methane (ch4) in natural gas

How do dying stars contribute to the formation of planets

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.

Match each statement with the state of matter it describes