Acompound differs from a mixture in that a compound
-contains only one element
- varies in chemical composition depending on the sample size
- has a definite composition by the elements that the compound contains
- can be classified as either heterogeneous or homogeneous

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Which statement describes james chadwick’s discovery.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?