This document is a learning package that supplements classroom learning for students working independently. It contains various activities and exercises about concepts related to electron configuration and orbitals that are intended to deepen understanding. The package instructs students to complete the activities independently and honestly, writing their answers on paper and comparing to an answer key after attempting each task.

2. Purpose of Strategic Intervention Material
(SIM) This learning package is intended to
supplement your classroom learning while
working independently . The activities and
exercises will widen your understanding
of the different concepts you should learn.
How to use this Strategic Intervention Material (SIM)?
•Keep this material neat and clean.
•Thoroughly read every page.
•Follow carefully all instructions indicated in
every activity.
•Answer all questions independently and honestly.
•Write all your answers on a sheet of paper.
•Be sure to compare your answers to the KEY TO
CORRECTIONS only after you have answered the given
tasks.
•If you have questions or clarifications ask your teacher.

3. MY ENERGY LEVEL!
Hello! Let us find how many sublevels exist in an energy level of
an electron. Observe the data on the table.

4. HOW DO I FIT IN MY ORBITALS?
Do you find it easy to do the previous activity? Now, let us do the
next exciting one!

5. SPIN ME UP! SPIN ME DOWN!
Wow! Great Job! Let’s do the spinning up and down of an
electron as it fill the orbitals.

6. MY E-CONFIGURATION!
Using your periodic table, lets write the electronic configuration of some
common elements. I know that you have already an idea on how to do it.
Right? Just follow the correct order on writing it.
Let me give you an example…
Silicon(14)- 1s22s22p63s23p2
Chlorine(17)-1s22s22p63s23p5
I.Electron Configurations
1. Write the complete electron configuration for each atom on the blank line.
Lithium
Fluorine __________
Carbon __________
Argon
Sulfur __________
Nickel __________
Rubidium
Xeon
Since you already knew how to write the electron configuration, now its time to do
it in reverse. Given the configuration, you are going to tell the element that it
represents. I’ll give you an example.
1s22s22p63s2 Magnesium (Mg)
Note: For you to get it easily, just count the number of electrons. The number of electrons
will tell you the number of protons which is also equal to the atomic number.
II. What elements are represented by each of the following electron configurations?
a. 1s2 2s2 2p5
b. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p65s2 4d10 5p4
c. 1s2 2s2 2p6 3s2 3p6 4s2
d. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

7. ORBITAL NOTATION
VS. E-CONFIGURATION
Isn’t it amazing??? Isn’t it surprising… In this activity, you are
going to write the orbital notation from an electron
configuration.
Don’t worry my friend…I will give you an example.
Electron Configuration 1s 2s 2p 3s 3p 4s 3d
Ca 1s22s22p63s23p6 4s2
Mg 1s22s22p63s2
Cl 1s22s22p63s23p5
Si 1s22s22p63s23p2
Ti 1s22s22p63s23p64s23d2
Remember that the total number of arrows are equal to the total number
of electrons in an electron configuration. Take note with some rules in
filling up the orbitals.
a. an electron can be represented by spin, one spinning up and
one spinning down.
b. in filling the orbitals with electron,it should start with lowest
energy level
c. an orbital in the same sublevel should be filled with one
electron before sharing
d.an orbital has a maximum number of two electrons.
Do you understand now the
concepts on the Electronic
Configurations and Orbital
Notations? Well, An assesstment
will be given on the next page to
test the level of your
understanding. Are you ready???

8. BRAIN BATTLE!
DIRECTIONS: Read the questions below.
Choose the best answer and write it on the space
provided. Each item is worth 2 points.
Good luck!
Turn to the Key Card to
Check your answers.
1. How many orbitals are in the following sublevels?
a) 3p sublevel = _____ d) 3d sublevel = _____
b) 2s sublevel = _____ e) 4f sublevel = _____
c) 4p sublevel = _____
2. Write the full electron configuration for each atom.
a) Phosphorus = _______________________________
b) Gold = _______________________________
c) Iodine = _______________________________
3. Give the symbol and names of the elements that correspond to these configurations of
an atom. Where does this element belong in the period table (e.g. noble gas, metalloid,
etc..)
a) 1s22s22p63s1 = _________________________________
b) 1s22s22p63s23p64s23d8 = _________________________________
c) 1s22s22p63s23p64s23d104p4 = _________________________________

9. Using a pen, encircle 10 terms related to the topic
in the word puzzle below. Words may appear
forwards or backwards, vertically, horizontally or
diagonally in the grid.
H I J L E V E L S K L M N
A T H S N F G M O E M O S
O M S H E L L P O Q I E L
E L E T R O N E R T T L E
N V L S G C D P A U A E V
O L E L Y A B R S T M C E
R A C O S T U O S V W T L
T T T V P G M T P H X R Y
U A R E I L L O N T E P G
E B O F L E C N C I X T R
N R N U H M A H A L P O E
P O T S L E V E L B U S N
C N S L A T I B R O Y Z E
ISN’T IT COOL AND FUN???
Want some more??? Now, turn
to the next page for the
continuation.
Turn to the Key Card to
Check your answers.

10. I am a negatively
charge particle. I get
excited but sometimes
are not. Who am I?
I am a positively
charge particle. I am
located in the nucleus.
Who am I?
I am a neutral charge
particle. I go with the
protons all the time.
Who am I?
I discover the electrons
of an atom. Who am I?
Turn to the Key Card to
Check your answers.
I am the region of
space where the
electrons are located.
Who am I?

12. How do I
rate my
learning on
this page?
What I already know about this page?
____________________________________
____________________________________
What I still want to know about this page?
___________________________________
____________________________________
What I have learned from this page?
____________________________________
____________________________________
(Please Check)
POOR
GOOD
EXCELLENT
S
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D
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N
T
‘S
N
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T
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