Question

question 1 (1 point) which of the following is the correct noble gas notation for iron (fe)? a ar 4s^13d^5 b ar 4s^23d^6 c ar 4s^24d^5 d ar 4s^24d^6 question 2 (1 point) which orbital can hold 10 electrons?

Explanation:

Step1: Recall iron's electron - configuration

Iron has an atomic number of 26. Argon (Ar) has an atomic number of 18. After argon, the electrons fill the 4s and 3d orbitals. The 4s orbital fills before the 3d orbital. The 4s orbital can hold 2 electrons and the 3d orbital can hold 10 electrons. For iron, after the 18 electrons of argon, 2 electrons go to 4s and 6 electrons go to 3d, so the noble - gas notation is [Ar]4s²3d⁶.

Step2: Recall orbital electron - capacity rules

The s orbital can hold 2 electrons, the p orbital can hold 6 electrons, and the d orbital can hold 10 electrons.

Answer:

Question 1: B. [Ar]4s²3d⁶
Question 2: D. d orbital