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Name________________________________________________Date___________________Period____

Quantum Mechanical Model: Aufbau Diagrams

H	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Li	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

F	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Ne	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Determine the atomic number (Z), proton number (p), and electron number (e) for the following elements. Use the electron number to add the correct number of electrons (↿) to the aufbau diagram and write the electron configuration below.

For ions, be sure to add or subtract the correct number of electrons before you fill out the aufbau diagram.

Example

2 of 5

S	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Ar	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

C	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Sc	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Cr	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Si	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

3 of 5

Cu	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Ga	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

K	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Br	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Kr	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Fe	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

4 of 5

N^3-	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

F^-	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

O^2-	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Mg²⁺	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Al³⁺	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Na⁺	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

5 of 5

S^2-	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Cl^-	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

K⁺	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

Ca²⁺	Z =	p =	e =
Aufbau Diagram
Electron Configuration

Energy

What is similar about the electron configurations of the ions on the previous page?

What noble gas (group 8A or 18) do their electron configurations resemble?

What is similar about the electron configuration of the ions above?

What noble gas(group 8A or 18) do their electron configurations resemble?

Are noble gases stable (unreactive) or unstable (reactive)?

Based on your answer to #5, why do you think ions form?