5.17 Hund's Rule and Orbital Filling Diagrams

Which of the following is the correct order of filling the orbitals?

1s, 2s, 2p, 3s

Which of the following is the correct orbital diagram for fluorine?

1s: two arrows different ways (up down); 2s: two arrows different ways (up down); 2p: five arrows (up down) (up down) (up)

Which of the following is the correct orbital diagram for oxygen?

1s: two arrows different ways (up down); 2s: two arrows different ways (up down); 2p: four arrows (up down) (up) (up)

Hund's rule states that...

Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron and that each of the single electrons must have the same spin

How many unpaired electrons does calcium have? You may need to draw the orbital filling diagram for the last sublevel that contains electrons.

0

If the above quantum numbers describe two different electrons in an oxygen atom, and the angular momentum number X is 1, what is the possible number of Y?

0

The number of unpaired electrons in an atom can be determined from the orbital filling diagrams and correctly applying Hund's rule. Boron has one unpaired electron, while carbon has two, and nitrogen has three. How many unpaired electrons does fluorine have?

1

For the principal quantum (shell) number of n equal 2, we can have ____ sub-levels.

Both A and B (S and P)

Up to ____, electron-electron repulsion does not come into the picture as there is no pairing of electrons in the d-subshell (sublevel).

Chromium

Which diagram descrbes the 3d orbital for chromium?

Each box has one arrow going up

2p orbital is lower in energy than 2s orbital.

FALSE

In the orbital diagram above, which of the following does it violate?

Hund's Rule

Which diagram describes the 2p orbital for silicon?

first box: two arrows different ways; second box two arrows different ways; third box: two arrows different ways (up down)

Which diagram describes how electrons fill the 3p orbital for sulfur?

first box: two arrows different ways; second box: one arrrow up; third box: one arrow up

An ____ _______ diagram is the visual way to represent the arrangement of all the electrons in a particular atom.

orbital filling

A single f-orbital can accommodate up to ____ electrons with opposite spin.

2

Which of the following sublevels has the highest energy?

3d

Which of the following corresponds to Hund's Rule?

4s: one arrow up; 3d: each box has an arrow going up

The short form electron configuration of ruthenium is [Kr]4d75s1, according to Hund's Rule, use "↑"or"↓" to correctly fill the following diagram. [Kr] 5s 4d. Choose the correct answer in the following choice.

up, up down, up down, up, up, up

An orbital filling diagram is...

The more visual way to represent the arrangement of all the electrons in a particular atom

Which of the following orbital diagrams violates the Aufbau Principle?

circle one: oen arrow up; seconf circle: two arrows different ways; third circle: one arrow up; fourth circle: none

Electron configurations of atoms in the ground state generally follow Hund's Law. Why does the electron configuration of copper in the ground state violate Hund's Law?

Copper's electron configuration corresponds with he most stable state (lowest possible energy)

The electronic configuration of Carbon is 1s^2 2s^2 2p^2 . It has two electrons in its 2p orbital. The second electron goes into the second p orbital rather than pairing up with the first electron in the first p orbital. What best explains the reason for this?

Electron-electron repulsive forces are minimized.

The last of the three rules for constructing electron arrangements requires...

Electrons to be placed one at a time in a set of orbitals within the same sublevel

The atomic number of an element whose outermost electrons are represented by 3d^6 will be 36.

FALSE

While moving down a group in the periodic table, energy shells are removed.

FALSE

Hund's rule specifies the order of electron filling within a set of orbitals

N/A

In an orbital filling diagram, the individual orbitals are shown as circles (or squares) and orbitals within a sublevel are drawn next to each other horizontally. Each sublevel is labeled by its principal energy level and sublevel. Electrons are indicated by arrows inside the circles. An arrow pointing upwards indicates one spin direction, while a downward pointing arrow indicates the other direction.

N/A

Orbital filling diagrams are a way of indicating electron locations in orbitals

N/A

Is the above figure is correct?

No

All the electrons are paired in ____.

S^2-

According to the Aufbau process...

Sublevels and orbitals are filled with electrons in order of increasing energy. Since the s sublevel consists of just one orbital, the second electron simply pairs up with the first electron as in helium. The next element is lithium and necessitates the use of the next available sublevel, the 2s

As per Hund's rule, each 'p' orbital receives one electron before a second electron is added.

TRUE

Hund's rule states that, orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron and that each of the single electrons must have the same spin.

TRUE

For ____, the 52nd electron must pair with one of the electrons in the 5p orbital.

Tellurium