According to Thomson's model, every atom consists of a positively charged sphere of radius `10^(-10)m` in which entire mass and positive charge of the atom are uniformly distributed. Inside the sphere, electrons are embedded like seeds in a watermelon. According Rutherford, entire positive charge and mass of the atom are concentrated in a tiny central core of the atom, which is called atomic nucleus. Size of nucleus `~~10^(-15)m`. The nucleus contains proton and neutrons. Negatively charged electrons revolve around the nucleus in circular orbits.
The size of atom is of the order of

Options

A. `10^(-14)m`
B. `10^(-12)m`
C. `10^(-10)m`
D. `10^(10)m`

Explanation

Atomic size is of the order of `10^(-10)m`