<classify> Nĩkĩndũ kĩ vĩnya kũkwatya na kĩthaa na, kwĩanana na Bohr model, nĩũkĩlĩa sya katĩ syĩthaa ĩthyũlũlũkĩtwe nĩ tũlũngũ tũnĩnĩ twitawa elekĩtronĩ, ota ũndũ planetĩ ĩthĩũkaa sũa - sĩsya ĩvĩsa ya 1.1.  <topic>: sciencetechnology 