Compounds: a. always have the same major characteristics as ...

[piesebel]

Compounds:
 a. always have the same major characteristics as their component elements.
  b. never have the same major characteristics as any of their component elements.
  c. often consist of a single element.
  d. are often surprisingly different from their component elements.
  e. have characteristics that can be easily predicted if you know the component elements.

Question 2

What observation first led scientists to conclude that water was a compound, not an element?
 a. Iron objects rust more readily in the presence of water.
  b. Water is effective in putting out fires.
  c. Water could be broken apart into hydrogen and oxygen by electrolysis.
  d. Water is formed when hydrogen burns.
  e. Water is one of the most abundant substances on Earth.

[tennis14576]

Answer to Question 1

d

Answer to Question 2

d

[piesebel]

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