An element cannot . a be part of a homogeneous mixture b be a pure substance c interact with other elements to form compounds d be part of a heterogeneous mixture e be separated into other substances by chemical means

Acycloalkane molecule contains 8 carbon atoms. how many hydrogen atoms are present in the molecule?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.