Author : Khairi

ATOMIC STRUCTURE

Nucleus

electron orbit

Author : Khairi

ATOMIC STRUCTURE

Author : Khairi

Nucleus

electron orbit

ATOMIC STRUCTURE

Author : Khairi

Nucleus

ATOMIC STRUCTURE

Author : Khairi

ATOMIC STRUCTURE

Author : Khairi

ATOMIC STRUCTURE

Author : Khairi

ATOMIC STRUCTURE

Author : Khairi

ATOMIC STRUCTURESTRUKTUR ATOM

Author : Khairi

PROTON

NEUTRON

+

-

Number of proton,Z + number of neutron = nucleon number,A

ATOMIC STRUCTURE

Author : Khairi

Nucleus

electron orbit

NUCLIDE NOTATION

XA

Z

A = nucleon number

Z = proton numberA - Z = number of neutron

ATOMIC STRUCTURE

Author : Khairi

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

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

Author : Khairi

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

Author : Khairi

EXERCISE

List the isotopes for Helium,Carbon and Cobalt

ATOMIC STRUCTURE

Author : Khairi

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

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

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

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

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