6) In an X ray experiment, different metals are used as the target. In each case, the frequency ν of the radiation produced is measured. If Z = atomic number, which of the following plots be a straight line?

7) In Moseley′s equation, √ν = a(Z − b):

8) What is the ratio of the probability of finding an electron at the nucleus to the probability of finding it at Bohr′s radius?

9) The velocity of an electron placed in the 3^rd orbit of H atom will be:

10) The increasing order of the values of e⁄m for electron (e), proton (p), neutron (n) and alpha particle (α) will be: