Where does the cathode rays get deflected?
A magnetic field only
An electric field only
Both electric and magnetic field
None of these
Isotones are nuclei having
Same atomic numbers
Same mass number
Same number of protons
Same number of neutrons
How many electrons will be present in the highest principal energy level of cobalt (z = 27) ?
2
7
9
1
Which is the spectral line obtained when an electron jumps from n = 6 to n = 4 energy level ?
Paschen series
Brackett series
Lyman series
Pfund series
In an atom with 2K, 8L and 13M electrons,what will be the total number of 'p' electrons ?
12
6
4
What will be the total spin resulting from a d6 configuration?
3
3/2
What is the Bohr radius associated with hydrogen atom ?
0.529 × 10-10 cm
5.29 × 10-10m
0.529 ×10-10m
0.0529 × 10-10m
What will be the energy of the electron in the first orbit of hydrogen if the energy of an electron in the 3rd Bohr orbit of hydrogen atom is -E ?
4 E
-E/6
-E/2
-9 E
What is the maximum number of electrons in an atom that can have the quantum numbers n = 3, ml = +1 ?
8
16
What is the ratio of the radii of the 2nd and 3rd Bohr orbits in hydrogen atom ?
3:8
3:4
9:16
4:9
