passwella.
Menu

JAMB Physics 1984 Question 25

Question 25

Modern Physics

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.

  1. A.I and II
  2. B.II and III
  3. C.III and IV
  4. D.II and IV
  5. E.I, II and III.
Show the answer and explanation

Answer: D (II and IV)

Explanation

An atom has a nucleus with electrons around it, which in the simple (Bohr) model move in circular orbits. Atoms of different elements differ, and a whole atom is neutral.