Consider the following selected postulates of Dalton's atomic ...

[hubes95]

Consider the following selected postulates of Dalton's atomic theory:
 
  (i) Each element is composed of extremely small particles called atoms.
  (ii) Atoms are indivisible.
  (iii) Atoms of a given element are identical.
  (iv) Atoms of different elements are different and have different properties.
  Which of the postulates is(are) no longer considered valid?
  A) (i) and (ii)
  B) (ii) only
  C) (ii) and (iii)
  D) (iii) only
  E) (iii) and (iv)

Question 2

An element cannot ________.
 
  A) be part of a heterogeneous mixture
  B) be part of a homogeneous mixture
  C) be separated into other substances by chemical means
  D) interact with other elements to form compounds
  E) be a pure substance

[Sophiapenny]

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[hubes95]

Thanks for the timely response, appreciate it

[upturnedfurball]

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