Atomic Blueprint Handout Atomic Blueprint
Master Reference Handout: Electron Configuration
STUDENT NAME:
CLASS PERIOD:
1. Finding the Electron Count
The first step in mapping an atom is knowing how many electrons it has. In a Neutral Atom , the number of electrons is always equal to the Atomic Number (Z) .
Z
Atomic Number = Number of Protons = Number of Electrons
Example: Sodium (Na) has Atomic Number 11. It contains 11 electrons to be placed in subshells.
2. Subshell Capacities
s One Orbital / Two Electrons Maximum
p Three Orbitals / Six Electrons Maximum
d Five Orbitals / Ten Electrons Maximum
f Seven Orbitals / Fourteen Electrons Maximum
3. The Diagonal Rule Chart
1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s 7p
4. Translating to Notation
Standard Notation (Spectroscopic)
Each subshell is listed in order with an exponent showing electron count.
1s2 2s2 2p6 ...
Orbital Notation (Arrows)
A visual map using lines (orbitals) and arrows (electrons). Opposite arrows represent opposite spins (Pauli Principle).
Filled Orbital
Half-Filled
The Golden Rule: Hund's Law
"Every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied."
5. Detailed Examples
Carbon (C)Z = 6
1s2 2s2 2p2
1s
2s
2p Subshell
Sodium (Na)Z = 11
[Ne] 3s1
Neon Core 1s22s22p6
3s orbital
Notebook Practice:
UP
DOWN
Ref: CHEM-ATOMIC-BLUEPRINT-v8 • Z=1 to 118
Atomic Blueprint Handout Atomic Blueprint
Student Reference Handout • Electron Configuration Mapping
Name:
Date:
Step 1: Finding the Electron Count
To map an atom, you need the total number of electrons. In a neutral atom , the electron count is equal to the Atomic Number (Z) found on the Periodic Table.
Subshell Reference
s: One Orb / 2e-
p: Three Orb / 6e-
d: Five Orb / 10e-
f: Seven Orb / 14e-
1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s 7p
Step 2: The Filling Order
The Sequence (Aufbau)
1s → 2s → 2p → 3s → 3p → 4s → 3d → 4p → 5s → 4d → 5p → 6s → 4f → 5d → 6p → 7s...
The Golden Rules
Aufbau: Fill lowest energy shells first.Pauli: Orbitals hold 2 e- max (opposite spins).Hund's: Single fill subshells before pairing up.
Step 3: Translating to Notation
Standard Form Written Notation
1s2 2s2 2p6 ...
Exponents show the number of electrons in each subshell.
Orbital Notation Visual Mapping
Filled
Half-Filled
Arrows show electron spin; horizontal lines show orbitals.
Carbon (C)Z = 6
1s2 2s2 2p2
Sodium (Na)Z = 11
[Ne] 3s1
Neon Core 1s22s22p6
Notebook Check: Try It Yourself
Element:
Standard Form:
Orbital Notation:
UP
DOWN
System Ref: V11-HANDOUT-2026
Atomic Blueprint Final Handout Atomic Blueprint
Universal Configuration Reference • Full Sequence Handout
Student:
Period:
Spin Up
Spin Down
1. The Electron Count
For any neutral atom , the number of electrons you need to place is equal to the Atomic Number (Z) found on the Periodic Table.
2. Subshell Capacities
s
One Orbital
Two Electrons Maximum
p
Three Orbitals
Six Electrons Maximum
d
Five Orbitals
Ten Electrons Maximum
f
Seven Orbitals
Fourteen Electrons Maximum
3. The Diagonal Rule
1s 2s 3s 4s 5s 6s 7s 2p 3p 4p 5p 6p 7p 3d 4d 5d 6d 4f 5f
Follow the dashed arrows from the upper-right to the lower-left. Build from the lowest energy levels up.
4. Translation
Standard Form
1s2 2s2 2p6
Filled
Half-Filled
Carbon (Z=6)
1s2 2s2 2p2
1s
2s
2p subshell
Sodium (Z=11)
[Ne] 3s1
Neon Core 1s2 2s2 2p6
3s
5. Try It Yourself
Element:
HANDOUT REF: Ground-State Electronic Blueprint System v12
Verified Technical Chemistry
Z = 1 to 118
Atomic Blueprint Final Handout Atomic Blueprint
Electron Configuration Handout
Student:
Date:
1. Finding Electrons
For neutral atoms, find the Atomic Number (Z) . This number tells you exactly how many electrons to place. Z = Electron Count
2. Subshell Capacities
s
One Orbital
Two Electrons Maximum
p
Three Orbitals
Six Electrons Maximum
d
Five Orbitals
Ten Electrons Maximum
f
Seven Orbitals
Fourteen Electrons Maximum
3. The Diagonal Rule
1s 2s 3s 4s 5s 6s 7s 2p 3p 4p 5p 6p 7p 3d 4d 5d 6d 4f 5f
Follow arrows Top-Right to Bottom-Left.
Carbon (Z=6)
1s22s22p2
1s
2s
2p (Hund's)
Sodium (Z=11)
[Ne] 3s1
Neon Core 1s22s22p6
3s
5. Try It Yourself
ELEMENT: Oxygen (Z=8)
Configuration Standard Form...
Ground-State Electronic Blueprint System v12.5 // PRINT_FRIENDLY
Verified Technical Data
Z = 1 to 118
Atomic Blueprint Final Handout Atomic Blueprint
Electron Configuration Guide
Student Name:
Date:
Spin Up
Spin Down
1. Electron Count
For neutral atoms, locate the Atomic Number (Z) . This tells you the total number of electrons.
2. Subshell Reference
s
One Orbital
Two Electrons Maximum
p
Three Orbitals
Six Electrons Maximum
d
Five Orbitals
Ten Electrons Maximum
f
Seven Orbitals
Fourteen Electrons Maximum
3. The Diagonal Rule
1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s 7p
Follow dashed arrows from top-right to bottom-left to build electron shells.
Carbon (Z=6)
1s2 2s2 2p2
1s
2s
2p subshell
Hund's Rule: Electrons fill singly first.
Sodium (Z=11)
[Ne] 3s1
Neon Core 1s22s22p6 complete
3s Orbital
4. Try It Yourself
Atom: Oxygen (Z=8)
Notation:
Ground-State Electronic Mapping System v13.0
Technically Verified Reference
Z = 1 to 118
Atomic Blueprint Final Handout Atomic Blueprint
Configuration Reference Guide
Name:
Date:
1. Electron Count
For neutral atoms , electrons = Atomic Number (Z) .
2. Subshell Capacities
s
One Orbital
2 Electrons Max
p
Three Orbitals
6 Electrons Max
d
Five Orbitals
10 Electrons Max
f
Seven Orbitals
14 Electrons Max
3. The Diagonal Rule
1s 2s 3s 4s 5s 6s 7s 2p 3p 4p 5p 6p 7p 3d 4d 5d 6d 4f 5f
Top-Right to Bottom-Left filling order
Carbon (Z=6)
1s22s22p2
1s
2s
2p (Hund's Rule)
Sodium (Z=11)
[Ne] 3s1
Neon Core 1s22s22p6 Complete
3s valence
4. Check: Oxygen (Z=8)
Configuration Standard Form...
REFERENCE Blueprint System v14.0 // Z=1 to 118
Up Down
Atomic Blueprint Final Handout Atomic Blueprint
Configuration Reference Guide
Name:
Date:
1. Electron Count
For neutral atoms , electrons = Atomic Number (Z) .
2. Subshell Capacities
s
One Orbital
2 Electrons Max
p
Three Orbitals
6 Electrons Max
d
Five Orbitals
10 Electrons Max
f
Seven Orbitals
14 Electrons Max
3. The Diagonal Rule
1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s 7p
Top-Right to Bottom-Left filling order
Carbon (Z=6)
1s22s22p2
1s
2s
2p (Hund's Rule)
Sodium (Z=11)
[Ne] 3s1
Neon Core [1s22s22p6]
3s valence
4. Check: Oxygen (Z=8)
Configuration Standard Form...
REFERENCE Blueprint System v14.2 // LANDSCAPE HANDOUT
Up Down
