This lesson contains 15 slides, with interactive quizzes and text slides.
Items in this lesson
SCIENCE
GRADE-9
FEB 1, 2021
MS.FAMIN
Slide 1 - Slide
RULES - SEMESTER 2
1. Everyday participation will be marked and the the list can be found in files of Science team
2. All the links should be joined before the class
3. Active participation is required from everybody
Slide 2 - Slide
launch lab
Take a paper
Start tearing the paper
Continue tearing the paper till you cannot proceed
Slide 3 - Slide
OBJECTIVES
1. Describe the characteristics of subatomic particles
2. Examine the nature of isotopes
Slide 4 - Slide
ELECTRON
NUCLEUS
Slide 5 - Drag question
PROTONS
ELECTRONS
NEUTRONS
NO CHARGE
POSITIVE CHARGE
NEGATIVE CHARGE
Slide 6 - Drag question
Slide 7 - Slide
Calculate the number of protons, neutrons and electrons in an atom of oxygen
Slide 8 - Open question
Slide 9 - Slide
If the abundance of three isotopes of oxygen are oxygen -16 is 99.7 %, oxygen -17 is 0.38 % and oxygen-18 is 0.20 % what is the average atomic mass of oxygen?
A
18
B
17
C
16
D
17.5
Slide 10 - Quiz
Using the abundance of lithium isotope predict the atomic mass of lithium atom
A
6.94
B
8.0
C
5.50
D
7.93
Slide 11 - Quiz
A sample of copper contains 69.17 % Cu-63 and 30.83 % of Cu-65. What is the average atomic mass of copper?
Slide 12 - Open question
Nitrogen contains 99.63 % N-14 and 0.37 % N-15. What is the average atomic mass of nitrogen
Slide 13 - Open question
OBJECTIVE CHECK
1. Describe the characteristics of subatomic particles