Write down the complete electronic configuration of sodium.

The electronic configuration of sodium (Na), which has an atomic number of 11, is as follows:

1. The first energy level (K shell) can hold up to 2 electrons. So, we put 2 electrons in the 1s orbital. We write this as 1s².

2. The second energy level (L shell) can hold up to 8 electrons. It has one s orbital and three p orbitals. We put 2 electrons in the 2s orbital and 6 electrons in the 2p orbital. We write this as 2s² 2p⁶.

3. The third energy level (M shell) can also hold up to 8 electrons, but sodium only has one left. So, we put this one electron in the 3s orbital. We write this as 3s¹.

So, the complete electronic configuration of sodium is 1s² 2s² 2p⁶ 3s¹.

The electronic configuration of sodium (Na), which has an atomic number of 11, is as follows:

1. The first energy level (K shell) can hold up to 2 electrons. So, we put 2 electrons in the 1s orbital. We write this as 1s².

2. The second energy level (L shell) can hold up to 8 electrons. It has one s orbital and three p orbitals. We put 2 electrons in the 2s orbital and 6 electrons in the 2p orbital. We write this as 2s² 2p⁶.

3. The third energy level (M shell) can also hold up to 8 electrons, but sodium only has one left. So, we put this one electron in the 3s orbital. We write this as 3s¹.

So, the complete electronic configuration of sodium is 1s² 2s² 2p⁶ 3s¹.

The electronic configuration of sodium (Na), which has an atomic number of 11, is as follows:

1. The first energy level (K shell) can hold up to 2 electrons. So, we put 2 electrons in the 1s orbital. We write this as 1s².

2. The second energy level (L shell) can hold up to 8 electrons. It has one 2s and three 2p orbitals. We fill up the 2s orbital first (2 electrons), then the 2p orbital (6 electrons). We write this as 2s² 2p⁶.

3. The third energy level (M shell) can also hold up to 8 electrons, but sodium only has one left. This electron goes into the 3s orbital. We write this as 3s¹.

So, the complete electronic configuration of sodium is 1s² 2s² 2p⁶ 3s¹.