Ionization energy (I. E.) is the energy required to remove an electron from a gaseous atom or ion.
• First I.E. corresponds to removing the first valence electron from a neutral atom
• Second I.E. refers to removing a second electron
• Third I.E. refers to removing the third electron
Which reaction below represents the second ionization of Sr?
a. Sr(g) → Sr+(g) + e -
b. Sr2+(g) + e - → Sr+(g)
c. Sr+(g) + e - → Sr(g)
d. Sr -(g) + e - → Sr2-(g)
e. Sr+(g) → Sr2+(g) + e -
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