Question:
the ionisation energy of hydrogen atom is 13.6eV,the ionisation energy of a singly ionized helium atom would be
Answer:
Singly ionized helium is an atom that has lost one of its electron. There is only one difference between hydrogen atom and singly ionized helium atom, the number of protons in the nucleus.
So we can define the energy states of a singly ionized atom by using the formula-
En = -(4×13.6)/ n2
We will get the energy value of each state, by putting the value of n=1,2,3...
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