nucleus 1 st shell (max. 2 e - ) 2 nd shell (max. 8 e - ) 3 rd shell (max. 8 e - )
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Transcript of nucleus 1 st shell (max. 2 e - ) 2 nd shell (max. 8 e - ) 3 rd shell (max. 8 e - )
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nucleus
1st shell(max. 2 e-)
2nd shell(max. 8 e-)
3rd shell(max. 8 e-)
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X
X
X
X
X
X
X
2.5
No. of electrons= 7
N
Valence electrons
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X
No. of electrons= 13X
XX
XXX
XX
XAl
X
X
X
2.8.3
Valence electrons
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1. Form 8 groups with each group consisting of 4 members
2. Elect a group leader3. Every group leader must
go to the teacher’s table to get the task sheet
4. After the task sheet is obtained, all groups must complete the task within 10 minutes
5. ALL members must participate in this activity
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X
No. of electrons= 13X
XX
XXX
XX
XAl
X
X
X
2.8.3
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Please paste your answers (manila
cards) on the
whiteboard
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HOMEWORK:Notebook: Copy the Summary on page 23Exercise book: Work This Out 2.6 Calculation on page 22Submit both on 7/2/11 (Monday)
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CNY HOMEWORK:Complete the worksheet and paste it in your exercise bookSubmit on 21/2/ 11 (Monday)
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REMINDER:Submit
PEKA report on
14/2/ 11 (Monday)
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REMINDER:Please
bring your calculators in the next
class