Respuesta :
It would be the one that has the highest orbital level on the s suborbital which in this case would be Ra
Answer: The correct answer is Radium (Ra).
Explanation:
Energy level having highest value of principle quantum number which is 'n' will have the highest energy electrons.
For the given options:
Radium (Ra): The number of electrons present in this element are 88 and electronic configuration of this element is [tex][Rn]7s^2[/tex]
It has 2 electrons in 's' orbital having n = 7.
Neon (Ne): The number of electrons present in this element are 10 and electronic configuration of this element is [tex][He]2s^22p^6[/tex]
It has 2 electrons in 's' orbital having n = 2.
Aluminium (Al): The number of electrons present in this element are 13 and electronic configuration of this element is [tex][Ne]3s^23p^1[/tex]
It has 2 electrons in 's' orbital having n = 3.
Lanthanum (La): The number of electrons present in this element are 57 and electronic configuration of this element is [tex][Xe]5d^16s^2[/tex]
It has 2 electrons in 's' orbital having n = 6.
Hence, the correct answer is Radium (Ra).
