Explain the observations and conclusions drawn by the Rutherford from the α-particle scattering experiment.

Write the electronic configuration of the hydrogen.

(Atomic number of $\mathrm{H}=1$)

Write the electronic configuration of the sodium.

(Atomic number of $\mathrm{Na}=11$)

Answer these questions. Write the electronic configuration of the potassium.

(Atomic number of $\mathrm{K}=19$)

Write the electronic configuration of Boron.

(Atomic number of $\mathrm{Boron}=5$)

Answer these questions. Write the electronic configuration of carbon.

(Atomic number of $\mathrm{C}=6$)

Answer these questions. Write the electronic configuration of oxygen.

(Atomic number of $\mathrm{O}=8$)