use the periodic table to determine the electron configuration for si and y in noble - gas…
use the periodic table to determine the electron configuration for si and y in noble - gas notation.\nsi:\nhe2s²2p⁶3s²3p⁵\nar4s²4p⁵\nne3s²3p²\nne3s²3p⁴
Answer
Explanation:
Step1: Identify Si's atomic number
Silicon (Si) has an atomic number of 14.
Step2: Select the nearest noble - gas before Si
The nearest noble - gas before Si is neon (Ne), which has an atomic number of 10.
Step3: Determine the remaining electrons
14 - 10 = 4 remaining electrons.
Step4: Write the electron configuration after the noble - gas
The remaining 4 electrons fill the 3s and 3p orbitals as $3s^{2}3p^{2}$. So the noble - gas notation for Si is $[Ne]3s^{2}3p^{2}$.
Answer:
[Ne]3s²3p²