written by gogorabei | November 10, 2022
#1. which of the following elements its d-sublevel is half filled in atomic state?
#2. In atomic state the paring of electrons in 3d orbitals starts after ....... element
#3. x and y are two transition elements from the 1st. series in which d-sublevel have the same number of electrons so x and y may be:
#4. The number of elements of the 1st. series that all its orbitals completely filled except one orbitals equal ...... elements
#5. which of choice represents the element in transition series that is located after 38Sr
#6. In the main transition elements the vertical group that not take B letter contains ...... elements
#7. In nickel atom 3d-sublevel contains ........ unpaired electrons
#8. In the first column in d-block the elements are ended with configuration ....... and the last column elements are ended with configuration .....
#9. The second transition series contains ........ elements
#10. The fourth transition series includes the elements in which the ......... sublevel is filled successively
#11. In d-block the number of groups is less than number of vertical columns by .......
#12. d-block contains ........ vertical columns and ........... groups .
#13. In the periodic table the main transition elements start with group ..........
