Potassium has the electronic configuration [Ar] 4s1, so the principal quantum number of the outermost electron is 4.

Chlorine has an atomic number of 17, and its valence electrons are in the n=3 shell.

In a hydrogen atom, the energy of an electron increases with increasing principal quantum number (n).

The d orbitals have a double dumbbell shape.

The p-orbital has a dumbbell shape.

The spin quantum number can be +1/2 or -1/2 for an electron in an orbital.

The spin quantum number (m_s) is +1/2 for an electron with clockwise spin.

The spin quantum number (m_s) can be +1/2 or -1/2 for an electron.

The total number of electrons is 36 (from Kr) + 2 (from 5s2) + 10 (from 4d10) + 5 (from 5p5) = 53.

The n=2 shell has 4 orbitals: 1s and 3p orbitals.

The total number of orbitals in the n=3 level is given by n^2 = 3^2 = 9.

The total number of orbitals in a shell is given by n^2. For n=4, it is 4^2 = 16.

Four quantum numbers (n, l, m_l, s) are required to completely describe an electron in an atom.

For d orbitals, the azimuthal quantum number l is equal to 2.

The principal quantum number n for the f subshell is 4.

The principal quantum number (n) indicates the energy level of the electron. For 4s, n=4.

In the ground state, the electron is in the first energy level, which corresponds to n=1.

Potassium (K) has an atomic number of 19, and its electron configuration ends in 4s, so the outermost electron has n=4.

Potassium has the electronic configuration [Ar] 4s1, so the outermost electron is in n=4.

Sodium has an atomic number of 11, and its electron configuration is 1s² 2s² 2p⁶ 3s¹. The outermost electrons are in n=3.

The ground state of hydrogen corresponds to n=1.

Sodium has an atomic number of 11, and its outermost electrons are in the n=3 shell.

Potassium has an atomic number of 19, and its outermost electrons are in the n=4 shell.

The element with the configuration 1s2 2s2 2p6 3s2 3p1 is Aluminum (Al).

The configuration corresponds to Krypton (Kr), which has 36 electrons.

The configuration 1s2 2s2 2p6 3s2 3p6 is incorrect as it exceeds the maximum number of electrons in the 3rd shell.

The configuration 1s2 2s2 2p6 corresponds to Neon, a noble gas.

The configuration [Kr] 5s2 4d5 represents Molybdenum (Mo), a transition metal.

Nitrogen has the electronic configuration 1s2 2s2 2p3, which means it has a half-filled p subshell.

Chromium (Cr) has an electronic configuration of [Ar] 4s1 3d5, which means it has an incomplete d subshell.