Answer:
Noble gas configuration of Europium (Eu)
Explanation:
- We are supposed to identify the element with the configuration given.
- It is known as noble gas configuration of an element, where noble gases are used to write the configuration of the element.
- This is done by first identifying the atomic number of the element in question, then identify a noble gas which has a less atomic number that is close to the element in Question.
- Then distribute the remaining electrons on the remaining orbitals of the element.
In this case;
The noble gas configuration is [Xe]6s²4f⁷
The noble gas is xenon which has an atomic number of 54
Therefore;
The atomic number of the element in question is 54 + 2 +7 = 63
Hence,
The element in question is Europium (Eu) with an atomic number of 63
Thus;
[Xe]6s²4f⁷ is the noble gas configuration of Europium (Eu)
