which is the electron configuration for boron?\n1s²2s³\n1s²2s²3s¹\n1s¹2s²2p²\n1s²2s²2p¹
which is the electron configuration for boron?\n1s²2s³\n1s²2s²3s¹\n1s¹2s²2p²\n1s²2s²2p¹
Answer
Explanation:
Step1: Determine boron's atomic number
Boron has an atomic number of 5, so it has 5 electrons.
Step2: Fill orbitals according to rules
Electrons fill orbitals in the order 1s, 2s, 2p etc. The 1s orbital can hold 2 electrons, the 2s orbital can hold 2 electrons, and then the remaining 1 electron goes into the 2p orbital. So the electron - configuration is $1s^{2}2s^{2}2p^{1}$.
Answer:
$1s^{2}2s^{2}2p^{1}$ (the fourth option)