Question

Consider the electron configuration

Which element has this electron configuration?
astatine
bromine
chlorine
fluorine

Answer 1

Chlorine

Step-by-step explanation:

Chlorine has the electron configuration 1s2 2s2 2p6 3s2 3p5. This is because it has 17 electrons.

Answer 2

Answer: The element having given electron configuration is chlorine.

Step-by-step explanation:

Electronic configuration tells us about the number of electrons that are present in an atom. It also determines the atomic number of an element.

We are given:

Electronic configuration of element =
`1s^22s^22p^63s^23p^5`

Total number of electrons in the given element = (2 + 2 + 6 + 2 + 5) = 17

Element having atomic number '17' is chlorine

Hence, the element having given configuration is chlorine