The document provides an overview of atoms and their subatomic particles, specifically electrons, protons, and neutrons, detailing their charges, masses, and locations within the atom. It also outlines classroom reminders for students and includes a review of concepts related to phase changes and materials that conduct or insulate electricity. Additionally, it suggests questions and activities for students to engage with the material.

1. SUBATOMIC PARTICLE
OF AN ATOM
PREPARED BY: AIRA MAE D. DELA CRUZ
-PRACTICE TEACHER-

2. Classroom Reminders
 Sit properly.
 If you want to answer, just raise your hands. Do
not answer in chorus.
 Avoid chatting with your seatmates during
class discussion.
 Avoid using cellphone during class discussion,
unless it is needed.

3. LETS REVIEW!
Melting
Liquid
Evaporation
Condensation
Sublimation
Gas

4. Picture Analysis

5. What is an Atom?
The word “atom” derived from the
Greek word “atomos” which means
indivisible.
Atom is the smallest particle unit of
matter and thought to be the smallest
particle of a given element.

6. THE SUBATOMIC PARTICLES AND
THEIR PROPERTIES
Subatomic particles
The particles which
make up the atom.
Electron
Proton
Neutron

7. THE THREE (3) SUBATOMIC PARTICLES
OF AN ATOM
Protons
 The positively charge
 Found in the nucleus of an atom
Electrons
 The negatively charge
 Found outside of the nucleus.
Neutrons
 No charge
 Found inside the nucleus of an atom
Neutron
Proton
Electron
Electron
Shell-Orbit

8. Properties of the three subatomic
particles
The mass of an atom is solely due to the mass of
the proton and neutron.
Subatomic Particle
(Symbol)
Charge Mass in
grams
Location in
the Atom
Discoverer
Electron -1 Outside the
Nucleus
Joseph John
Thomson
Proton +1 Inside the
Nucleus
Ernest
Rutherford
Neutron 0 Inside the
Nucleus
James
Chadwick

9. Nucleons
Referred to the proton
and neutron inside the
nucleus.
It forms the nucleus within
the center of the atom.

11. Electric charge
Is a fundamental electrical property
that is either of positive or negative
type to which the mutual attractions
or repulsions between protons or
electrons is attributed.

12. Conductors
Are materials that allow the electrons to flow
freely from atom to atom.
Examples:
Iron
Copper
Aluminum

13. Insulators
Are materials that prevent the free flow of
electrons from atom to atom
Examples:
Rubber
Wood

14. GENERALIZATION
1. What are the three subatomic particles of an atom?
2. What is the charge of proton?
3. What is the charge of electron?
4. How about the neutron?
5. Where does the proton located?
6. Where does the electron located?
7. How about the neutron?

16. I. Direction: Identify the term being referred to. Write
your answer on a separate sheet of paper.
_____1. Most of the mass of an
atom is found in the _______.

17. _____2. The subatomic particle
of an atom which has a positive
charge.

18. _____3. It is where the
protons located.

19. _____4. It is referred to the
proton and neutron inside
the nucleus.

20. _____5. It is where the
electrons are located.

21. II. Direction: Illustrate the
model of an atom and label
its subatomic particles. (5 pts)