Lesson Plan 2nd Meeting.docx

Lesson Plan in Science and Technology Grade 8 I.

OBJECTIVE: At the end of the lesson, the students will be able to: a) Characterize the subatomic particles. b) Determine the number of protons, neutrons and electrons in a particular atom. c) Differentiate between mass number and atomic number and between ions and isotopes.

II. SUBJECT MATTER: TOPIC : What Makes Up an Atom? SUB-TOPIC : The Subatomic Particles: Identity of Atom. MATERIALS : Laptop, LCD Projector, White board marker. REFERENCES : Internet, Science and Technology 8 Pages 166-173. III. PROCEDURE Teacher’s Activity A. Preliminary Activities Prayer, Greetings, Classroom management and checking of Attendance. “Let’s start our day with a pray. Stand up please. Who’s going to be volunteer to lead the pray.” “Thank you for lead us to pray”

Student’s Activity

(The volunteer student will go in front of the class) “In the name of the Father and of the Son, and of the Holy Spirit. Amen…”

“Good morning class!!! Mabuhay!” “Kindly pick up the pieces of papers or candy wrappers under your chairs before taking your seats.”

“Good morning sir! Mabuhay!” (Students will pick all the trashes and arrange their chairs)

“Jonathan, who’s absent today?” “Thank you, Jonathan” “Okay, I will teach you some Bahasa Indonesia. If, I say Selamat Pagi, you can say Selamat Pagi Juga. And If I say One Clap you should clap your hand once, if I say Double Clap you should clap twice your hands

“None sir.”

“last time we learn about the atomic theory. You can tell me, did you remember who are John Dalton, JJ. Thomson, Ernest Rutherford, Niels Bohr?”

(Students will think and find the answer. Students will raise their hands) “yes sir, they are the developer of the theory of atom”

“Okay sir.”

(Students clap their hands.) “okay, thankyou alice”

B. Motivation “Did you remember atom is no longer be the smallest particles? There’s smaller particle than atom. What is that?”

“There’s sub atomic particles sir” “Okay Sir Adi”

“That’s right, give applause to Yuda” “Yes sir, there is Proton, Neutron, Electron” “do you remember the subatomic charge?” “Okay sir” “So, we will learn about The Subatomic Particles” C. Lesson Proper (Opening Powerpoint) “so what made up of an atom?”

“Look at the picture”

“Atoms are made up of even smaller subatomic particles, three types of which important are: the proton, neutron, and electron. The number of positively-charged protons and non-charged (“neutral”) neutrons, gives mass to the atom, and the number of each in the nucleus of the atom determine the element. The number of negatively-charged electrons that “spin” around the nucleus at close to the speed of light equals the number of protons. An electron has about 1/2000th the mass of a proton or neutron” “(a) In the planetary model, the electrons of helium are shown in fixed orbits, depicted as rings, at a precise distance from the nucleus, somewhat like planets orbiting the sun. (b) In the electron cloud model, the electrons of carbon are shown in the variety of locations they would have at different distances from the nucleus over time”

“Two Models of Atomic Structure.” “An atom’s protons and electrons carry electrical charges. Protons, with their positive charge, are designated p+. Electrons, which have a negative charge, are designated e–. An atom’s neutrons have no charge: they are electrically neutral.” “Okay, we will study about the atomic number and mass number” (Showing powerpoint presentation) “Allisha please read!”

“An atom of carbon is unique to carbon, but a proton of carbon is not. One proton is the same as another, whether it is found in an atom of carbon, sodium (Na), or iron (Fe). The same is true for neutrons and electrons.”

“So, what gives an element its distinctive properties—what makes carbon so different from sodium or iron?” “The answer is the unique quantity of protons each contains, sir” “Okay, next”

“Carbon by definition is an element whose atoms contain six protons. No other element has exactly six protons in its atoms. Moreover, all atoms of carbon, whether found in your liver or in a lump of coal, contain six protons”

“Thus, the atomic number, which is the number of protons in the nucleus of the atom, identifies the element. Because an atom usually has the same number of electrons as protons, the atomic number identifies the usual number of electrons as well.” “In their most common form, many elements also contain the same number of neutrons as protons. The most common form of carbon, for example, has six neutrons as well as six protons, for a total of 12 subatomic particles in its nucleus. An element’s mass number is the sum

of the number of protons and neutrons in its nucleus.” “The periodic table of the elements, is a chart identifying the 92 elements found in nature, as well as several larger, unstable elements discovered experimentally. The elements are arranged in order of their atomic number, with hydrogen and helium at the top of the table, and the more massive elements below. The periodic table is a useful device because for each element, it identifies the chemical symbol, the atomic number, and the mass number, while organizing elements according to their propensity to react with other elements. The number of protons and electrons in an element are equal. The number of protons and neutrons may be equal for some elements, but are not equal for all”

(Students are listening)

“okay, did you get the point?”

“yes, sir”

D. Application “Okay, we will play a game. Instructions/Directions: I will call you one by one and you must go forward and explain the atomic number and mass number of the elements on this periodic table” “Do you have any questions?” “Okay, lets start”

“No, Sir”

E. Generalization “Based on our discussion today, what is the meaning of atom?” “Atoms are made up of even smaller subatomic particles, three types of which important are: the proton, neutron, and electron” “Very good! Thankyou Janu!” “Correct! You are good students!” “Precisely! So, do you have any questions regarding our lesson today?”

“the atomic number, which is the number of protons in the nucleus of the atom, identifies the element”

IV. Evaluation 1. The characteristic that gives an element it’s distinctive properties is it’s number of…. 2. Nitrogen has an atomic number of seven. How many electron shells does it likely have? V. Assignment -

Prepared by:

ADI PURWITO Student Teacher Checked by:

MARIA ARLENE P. GONZALES Teacher-Mentor