Among the elements A,B,C and D having atomic numbers 9,10,11 and 12 respectively the correct order of ionisation energies is

The atomic nubers of the elements A, B, C and D is 9, 10, 11 and 12 respectively. The correct order of ionization energies is :

Elements A,B, C and D have atomic number 9,17,19,35 respectively. Choose the odd element-

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : forms an anion

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one : forms a cation

Among the elements A, B, C and D having atomic numbers 7,8,9 and 12 the element having smallest size is _____

The elements A,B,C,D and E have atomic number 9,11,17,12 and 13 respectively. Which pair of elements belong to the same group?