$\mathrm{N}^{3-}, \mathrm{F}^{-}, \mathrm{O}_2, \mathrm{Ca}^{2+}$

$\mathrm{Ca}^{2+}, \mathrm{Cl}^{-}, \mathrm{Al}^{3+}, \mathrm{O}_2^{-}$

$\mathrm{N}^{3-}, \mathrm{Mg}^{2+}, \mathrm{F}^{-}, \mathrm{O}^{2-}$

$\mathrm{Mg}^{2+}, \mathrm{O}_2^{-}, \mathrm{Cl}^{-}, \mathrm{N}_3^{-}$

This model can be visualised as a pudding or watermelon of positive charge with plum or seeds as electrons embedded into it.

The mass of the atom is assumed to be uniformly distributed over the atom.

An atom possesses a spherical shape in which the positive charge in uniformly distributed.

This model could not explain the overall neutrality of the atom.

In the absence of electric or magnetic field, the cathode rays travel in straight line.

In the presence of electric or magnetic field, the behaviour of cathode rays is similar to that expected from negatively charged particles.

In the presence of electric and magnetic field, the cathode rays travel in straight line.

The cathode rays starts from the cathode and move toward the anode.

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