LO 22 through 26

Electron configurations for O

1s^2 2s^2 2p^4 [HE] 2s^2 2p^4

Electron configurations for Ne

1s^2 2s^2 2p^6 [He] 2s^2 2p^6

Electron configurations for Si

1s^2 2s^2 2p^6 3s^2 3p^2 [Ne] 3s^2 3p^2

Electron configurations for K

1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 [Ar] 4s^1

How many different values of ml are possible in the 2p sublevel? - 1 - 2 - 5 - 3 - 7

3

Calculate the wavelength of light produced if an electron moves from n = 5 state to n = 2 state of an electron in a hydrogen atom

4.34 x 10^-7 m

How many subshells are these in the shell with n = 6? - 6 - 36 - 15 - 5

6

When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as - Heisenberg uncertainty principle - Hund's rule - Aufbau principle - Pauli exclusion principle

Hund's rule

No two electrons can have the same four quantum numbers is known as the - Aufbau principle - Pauli exclusion principle - Hund's rule - Heisenberg uncertainty principle

Pauli exclusion principle

Which statement is true? - an orbital that does not penetrate into the region occupied by core electrons is less shielded from nuclear charge than an orbital that penetrates and will therefore have a higher energy - an orbital that does not penetrate into the region occupied by core electrons is less shielded from nuclear charge than an orbital that penetrates and will therefore have a lower energy - an orbital that does not penetrate into an region occupied by core electrons is more shielded from nuclear charge than an orbital that penetrates and will therefore have a lower energy - an orbital that does not penetrate into the region occupied by core electron is more shielded from nuclear charge than an orbital that penetrates and will therefore have a higher energy

an orbital that does not penetrate into the region occupied by core electrons is more shielded from nuclear charge than an orbital that penetrates and will therefore have a higher energy

Choose the statement that is TRUE - valence electrons are most difficult of all electrons to remove - core electrons effectively shield outer electrons from nuclear charge - outer electrons effectively shield one another from nuclear charge - core electrons are the easiest of all electrons to remove - all of the above are true

core electrons effectively shield outer electrons from nuclear charge

Predict if this wavelength higher or lower than those produced if an electron moves from n = 7 state to n = 2 state - higher - lower

higher

Which transition in the hydrogen atom results in emitted light with the longest wavelength? - n = 3 ---> n = 1 - n = 2 ---> n = 1 - n = 4 ---> n = 1

n = 2 ---> n = 1

What are the four quantum numbers for each of the two electrons in a 3s orbital? - n = 2, l = 0, ml = 0, ms = +1/2; n = 2, l = 0, ml = 0, ms = - 1/2 - n = 3, l = 0, ml = 0, ms = +1/2; n = 3, l = 0, ml = 0, ms = +1/2 - n = 3, l = 0, ml = -, ms = +1/2; n = 3, l = 0, ml = 0, ms= -1/2 - n = 3, l = 1, ml = 0, m = +1/2; n= 3, l = 1, ml = 0, ms= - 1/2

n = 3, l = 0, ml = -, ms = +1/2; n = 3, l = 0, ml = 0, ms= -1/2

What are the possible values of n and ml for an electron in a 4p orbital? - n = 1, 2, 4 and ml = -2, -1, 0, +1, or +2 - n = 4 and ml = -1, 0, 1 - n = 1, 2, 3, or 4 and ml = 1 - n = 1, 2, 3, 4 and ml = -1, 0, +1

n = 4 and ml = -1, 0, +1

Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does NOT contain an error - n = 2. l = -1, ml = 0 - n = 4, l = 2, ml = +4 - n = 4, l = 3, ml = -2 - n = 3, l = 2, ml = -3

n = 4, l = 3, ml = -2

An electron in a hydrogen atom relaxes to the n = 4 level, emitting light of 114 THz. What is the value of n for the level in which the electron originated?

n = 6