which is the electron configuration for boron?\no 1s²2s³\no 1s²2s²3s¹\no 1s¹2s²2p²\no 1s²2s²2p¹

Brief Explanations:

Boron has an atomic number of 5. Electrons fill orbitals in the order of increasing energy according to the Aufbau - principle. The first two electrons go into the 1s orbital ($1s^2$), the next two into the 2s orbital ($2s^2$), and the remaining one electron goes into the 2p orbital ($2p^1$).

Answer:

$1s^{2}2s^{2}2p^{1}$