70.atomic structure
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Transcript of 70.atomic structure
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Author : Khairi
ATOMIC STRUCTURE
Nucleus
electron orbit
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Author : Khairi
Nucleus
electron orbit
ATOMIC STRUCTURE
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Author : Khairi
Nucleus
ATOMIC STRUCTURE
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Author : Khairi
ATOMIC STRUCTURE
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Author : Khairi
ATOMIC STRUCTURE
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Author : Khairi
ATOMIC STRUCTURE
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Author : Khairi
ATOMIC STRUCTURESTRUKTUR ATOM
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PROTON
NEUTRON
+
-
Number of proton,Z + number of neutron = nucleon number,A
ATOMIC STRUCTURE
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Nucleus
electron orbit
NUCLIDE NOTATION
XA
Z
A = nucleon number
Z = proton numberA - Z = number of neutron
ATOMIC STRUCTURE
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EXERCISE
Element Number of protons
Number of nucleons
Number of neutrons
Na23
1111 23 12
Ra226
8888 226 138
He4
22 4 2
ATOMIC STRUCTURE
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Author : Khairi
PROPERTIES OF PROTON,NEUTRON,ELECTRON
Element Charge value
P1
1+ 1.6 x 10 –19 C
n1
00
e0
-1- 1.6 x 10 –19 C
ATOMIC STRUCTURE
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RADIOISOTOPES
Isotopes – elements which have the same proton number but different nucleon number
Radioisotopes – isotopes which have unstable nuclei
H1
1 H2
1H
3
1
Proton number
ATOMIC STRUCTURE
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Author : Khairi
EXERCISE
List the isotopes for Helium,Carbon and Cobalt
ATOMIC STRUCTURE
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Which diagrams shows the correct path of the negatively charged particle moves towards a nucleus of an atom ?
A B C D
Nucleus contains proton and neutron Neutron is negatively charged
Like charges will repel each others
PAST YEARS QUESTIONPAST YEARS QUESTION
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Author : Khairi
PAST YEARS QUESTIONPAST YEARS QUESTION
Isotopes of Hydrogen
Number of protons
Number of neutron
Number of nucleon
1
1H
2
1H
X
1H
1
1
1
0
1
3
1
A
2
What is the charge of proton ?
Positive
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Author : Khairi
PAST YEARS QUESTIONPAST YEARS QUESTION
Isotopes of Hydrogen
Number of protons
Number of neutron
Number of nucleon
1
1H
2
1H
X
1H
1
1
1
0
1
3
1
A
2
What is meant by isotopes ?
Elements which have same proton number but different nucleon number
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Author : Khairi
PAST YEARS QUESTIONPAST YEARS QUESTION
Isotopes of Hydrogen
Number of protons
Number of neutron
Number of nucleon
1
1H
2
1H
X
1H
1
1
1
0
1
3
1
A
2
What is the value of A ?
2
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Author : Khairi
PAST YEARS QUESTIONPAST YEARS QUESTION
Isotopes of Hydrogen
Number of protons
Number of neutron
Number of nucleon
1
1H
2
1H
X
1H
1
1
1
0
1
3
1
A
2
What is the value of X ?
3