radioactivity (understanding nucleus)

7/28/2019 RADIOACTIVITY (Understanding Nucleus)

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Form 5

Semester 1

Learning Area Radioactivity

Learning Objectives 5.1 Understanding the nucleus of an atom

Learning Outcomes - Describe the composition of the nucleus of an atom in terms of protons and neutrons.- Define proton number Z and nucleon number A.

- Explain the term nuclide

- Use the nuclide notation

- Define the term isotope

Duration 40 minutes

Prerequisite - Students already know that all material that exist in the universe build up by the basic unit of Atom

or cell.

- Each atom include proton, neutron ,nucleus and electronPedagogy : Strategies Thinking skills and thinking strategies, Constructivism through Inquiry-Discovery : Doing simple

experiments and having discussions

Material Resources Slide show, diagram(from internet), handout, worksheet (evaluation)

Method Group discussion

Noble Values Realizing that science is a means to understand nature, having critical and analytical thinking.

Reflection

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XA

Z


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Learning

Outco

mes

Teachers Activities Student activities Questions and expected

answer/Notes

Vocabulary

Describe the

compositionof the

nucleus of an

atom in termsof protons

and neutrons.

Define

proton

number Zand nucleon

number A.

Explain the

term nuclide

Use thenuclide

ENGAGEMENT

1. Hands out worksheet 1(a) Word

Jumble

2. Show a slide on the Hiroshima and

Nagasaki nuclear bombings.3. After that, teacher asks the student what

does the picture shows.4. Teacher relates the diagram shown with

the topic of the day.

EXPLORATION

1. Teacher give each student a handout

(Appendix 2) and ask the student to

complete in 3 minutes.

EXPLANATION

1. Teacher explains what is an atom

through a slide show. ( Appendix 1 )2. Then, teacher gives explanation with the

help of a slide show. ( Appendix 1)

Students try to answer

the word jumble in agroup.

Students make

observation and discussin groups.

Students give the

answer

Students complete the

exercise individually.

What is the picture all

about?

About nuclear bomb(accept any relevant

answer).

Teacher discusses the

answer and welcomes

any question.

Electron Particle that bears

a negative charge.

Proton Particlethat is stable and

bears a positivecharge.

Nucleus Thecentral core of an

atom that containsprotons and

neutrons.

Atom The

smallest part of anelement that can

exist

Radioisotope -Atoms that have

same number ofproton but

different numberof neutron.

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XA

Z


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notation

Define the

term isotope

EVALUATION

1. Teacher gives each student a handout

and asks the student to do it in about 5minutes. ( Appendix 3)

2. They may discuss with their friends.

CONCLUSION

1. Teacher concludes that an atom can be

determined by its number of proton,

electron, and nuclide number.

EXTENSION

Teacher assigns reading assignments of the

next subtopic : Radioactive decay and itscharacteristics

1. Students receive thehandout and discuss

with the friend in their

group.

Reading assignment

1. After that, teacherdiscusses with the

student the

answer for theexercise.

2. Furtherexplanation given

if the is any

confusion.

Nucleon No-

Number of protonand

neutron in an

atom

Proton No -

number of proton

in an atom

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radioactivity (understanding nucleus)

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