Which of the following statements describes an atom accurately? i. atoms of all elements are identical ii. an atom contains a nucleus and number of electrons iii. due to the electrons in the atom an atom is negatively charged iv. electrons in the atom move in circular orbits round the nucleus
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A.
i and ii -
B.
ii and iii -
C.
iii and iv -
D.
ii and iv only -
E.
i,ii and iii