Question

match the element/atom with its electron configuration
silicon, si
hydrogen, h
boron, b
1s²2s²2p⁶3s²3p²
1s¹
1s²2s²2p¹

Explanation:

Step1: Determine the atomic number of each element

• Silicon (Si) has an atomic number of 14.
• Hydrogen (H) has an atomic number of 1.
• Boron (B) has an atomic number of 5.

Step2: Write the electron configuration based on the atomic number

• For Si (\(Z = 14\)):
• Fill the orbitals in the order \(1s<2s<2p<3s<3p\).
• \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\) (since \(2 + 2+6 + 2+2=14\)).
• For H (\(Z = 1\)):
• Only one electron, so \(1s^{1}\).
• For B (\(Z = 5\)):
• Fill \(1s^{2}2s^{2}2p^{1}\) (\(2 + 2+1 = 5\)).

Answer:

Silicon, Si - \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\)
Hydrogen, H - \(1s^{1}\)
Boron, B - \(1s^{2}2s^{2}2p^{1}\)