Step-by-step explanation:
The full ground state electron configuration for silicon is given as;
1s² 2s² 2p⁶ 3s² 3p²
The closest noble gas to Si is Ne. The Noble gas shorthand is given as;
[Ne] 3s² 3p²
The full ground state electron configuration for copper is given as;
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹
The closest noble gas to Cu is Ar. The Noble gas shorthand is given as;
[Ar] 3d¹⁰ 4s¹
The electronic configuration for Ca is given as;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²