August 28, 2019 [LESSON PLAN IN SCIENCE 9]
I. Objectives:
1. Content Standard:
Understand the development of atomic models that led to the description of the
behavior of electrons within atoms.
2. Performance standard:
Report on the activities that communities engage in to protect and conserve
endangered and economically important species.
3. Learning Competencies/Objectives:
Describe how the Bohr model of the atom improved Rutherford’s atomic model.
(S9MT-IIa21)
Explain how the Quantum Mechanical Model of the atom describes the energies
and positions of the electrons.( S9MT-IIa22)
4. Specific objectives: The learners will be able to…
Examine the possible location of the electrons inside an atom
Explain the possible arrangement of electrons.
Assemble a model showing the possible arrangement of electrons in an atom.
II. Subject Matter
1. Topic : Electronic Structure of Matter
2. Reference : Teacher’s Guide page 85-88
3. Materials: Visual aid, Marker, etc.
III. Learning Task
1. Review
What is probability?
How is the concept of probability applied in Science?
2. Motivation
To demonstrate the concept of probability, the teacher will provide situations
showing probability and allow the learners guess the chance.
3. Lesson Proper
3.1 Activity
The class will be grouped into 5 groups. Each group will be instructed to perform
the activity in their book entitled “Predicting the Probable Location of an
Electron.”
3.2 Analysis
What did the activity demonstrate?
What developments of a better atomic model were derived from the idea of
Bohr?
What is Quantum Mechanical Model?
Describe in detail the Quantum Mechanical Model?
3.3 Abstraction
This activity demonstrates what scientists found out that it is not possible to know the
exact position of the electron. So, Bohr’s idea that electrons are found in definite
orbits around the nucleus was rejected.
Three physicists led the development of a better model of the atom. These were
Louie de Broglie, Erwin Schrodinger, and Werner Karl Heisenberg. De Broglie
proposed that the electron (which is thought of as a particle) could also be thought
of as a wave. Schrodinger used this idea to develop a mathematical equation to
describe the hydrogen atom. Heisenberg discovered that for a very small particle
like the electron, its location cannot be exactly known and how it is moving. This is
called the uncertainty principle.
The quantum mechanical model views an electron as a cloud of negative charge
having a certain geometrical shape. This model shows how likely an electron could
be found in various locations around the nucleus.
The quantum mechanical model also gives information about the energy of the
electron. The model also describes the region of space around the nucleus as
consisting of shells. These shells are also called principal or main energy levels. The
principal energy levels or shells may have one or more sublevels. These sublevels are
assigned with letters: s, p, d, f, and g.
3.4 Application
Create a concept map showing the development of atomic models from
that of Rutherford up to the Quantum Mechanical Model.
IV. Assessment
¼ sheet of paper
1. Whose mathematical equation gave birth to the Quantum Mechanical Model?
2. The space around the nucleus where the electron is most likely found is called?
3. What consist the region of space around the nucleus?
4. What letters are assigned to sub-level of energy levels?
5. What shape is assigned for s-orbital?
V. Assignment
Read in advance Electron Configuration.
VI. Reflection
A. No. of learners who earned 80% on
the formative assessment
B. No. of learners who require
additional activities for
remediation.
C. Did the remedial work? No. of
learners who have caught up with
the lesson.
D. No. of learners who continue to
require remediation.
E. Which of my teaching strategies
work well?
F. What difficulties did I encounter
which my principal or supervisor
can help me solve?
G. What innovation or localized
materials did I use/ discover which
I wish to share with other teachers.
