atomic emission spectra 2nd Sec first term

which of the following properties is not among those of the line spectrum

• it consists of coloured lines separated by lighted areas

• it arises from the return of the excited electron to its level

• it is produced through heating the atoms of the elements in the state of gas or vapour

• each element has a characteristic line spectrum

the highest amount of energy is released when the excited electron of hydrogen atom transfers from

• M to L and the location of this electron can be determined

• N to M and neither the location nor the speed of this electron can be determined precisely

• L to K and both the location and the speed of this electron can not be determined precisely

• L to K and both the location and the speed of this electron can be determined precisely

Bohr's atomic model is characterized from that of Rutherford in ............

• the electron displays a line spectrum when it loses a quantum

• the electron is a negatively charged particle

• the electron doesn't display a line spectrum when it loses a quantum

• the electron revolves around the nucleus in certain orbits

when an electron transfers from level K to level L , it gains one quantum and when it transfers from K to N it gains .................

• 0.5 quantum

• 1 quantum

• 2 quantum

• 3 quantum

To obtain the hydrogen atom visible spectrum of an electron which has been excited to the third energy level M , this electron must ...............

• lose a quantum lower than that gained

• lose a quantum which is gained

• gain a quantum

• lose a quantum higher than that gained