The formation of the oxide ion O2–(g) requires first an exothermic and then an endothermic step as shown below
This is because
O– ion will tend to resist the addition of another electron
The addition of second electron in an atom or ion is always endothermic as the incoming electron experience the greater force of repulsion.
The ionic radius of ‘Cr’ is minimum in which of the following compounds?
The incorrect statement among the following is
Which ionisation potential (IP) in the following equations involves the greater amount of energy?
The first four ionisation energy values of an element are 191, 578, 872 and 5962 kcal. The number of valence electrons in the element is
Which one of the following elements has the highest ionisation energy?
In the Periodic Table, going down in the fluorine group
The Ist IEs of four consecutive elements present in the second period of Periodic Table are 8.3, 11.3, 14.5 and 13.6 eV respectively. Which of these is the IE of nitrogen?
Which of the following transition involves maximum amount of energy?
The electronic configuration of four elements are given below. Which element does not belong to the same family?
The least stable ion among the following is