Nuclei

Question 1

If radius of atom is 10^-10 then what is the radius of nucleus

Answer 1

10^-15

Question 2

Find
Charge
Mass
Symbol
Of proton

Answer 2

Charge : +e
Mass : 1.6726×10^-27kg =1amu
Symbol : ¹H1

Question 3

Find
Charge
Mass
Symbol
Of neutron

Answer 3

Charge : 0
Mass : 1.6749×10^-27kg = 1amu
Symbol : ¹n0

Question 4

Atomic no. ?

Answer 4

No. Of proton

Question 5

Mass number?
Is the mass number is the mass of atom?

Answer 5

Mass number = no.nucleons
Mass number is not the mass of atom

Question 6

Mass of atom

Answer 6

No. Of nucleons × 1amu

Question 7

Classification of nucleus

Answer 7

Isobar
Isotope
Isotone

Question 8

What is isobar and give example

Answer 8

*same atomic number but different in mass number
*Protium
Deuterium
Tritium

Question 9

What is isotope give example

Answer 9

Atomic number different
Mass number same
Eg: ⁴⁰A18
⁴⁰K19
⁴⁰Ca20

Question 10

What is isotone and give example

Answer 10

Atomic no. Different
Mass no. Different
No. Neutrons same(A-Z)
¹⁴c6
¹⁶O8

Question 11

Nuclear Radius

Answer 11

R=R⁰*A¹/³

Question 12

Value Of R⁰

Answer 12

1.2fm

Question 13

If 1amu÷4/3 π *R⁰^³ is Nuclear density what is the value

Answer 13

2×10^¹⁷kg/m³

Question 14

For practical purpose Nuclear is in spherical shape is that true or false

Answer 14

True

Question 15

Nuclear Force 4 properties

Answer 15

Attractive
Short range distance
Strongest force
Charge independent
(Fpp=Fpn=Fnn)

Question 16

Einstein equation from special theory of relativity

Answer 16

E=mc²

Question 17

What is mass defect

Answer 17

The loss of mass during the formation of nucleus

Mass of nucleus <mass of nucleon

Question 18

What is Binding energy

Answer 18

The energy for nucleons to stay in nucleus

Question 19

Binding Enegy equation if mass m is ∆m

Answer 19

E=∆mc²

Question 20

m/∆m equation?

Answer 20

[Zmass of proton + (A-Z)mass of neutron] - mass of X (element)

Question 21

If ∆m is in amu how to find Binding energy in Mev(mega ev)

Answer 21

Just multiply with 931

Question 22

Heavy Hydrogen 1.1Mev
Fe 469Mev
Uranium 1800 Mev
Which has more Nuclear stability

Answer 22

Fe have more stability

Question 23

Nuclear Stability is that based on B.E ?

Answer 23

No,its based on B.E/nucleon
Fe>Ur

Question 24

Lighter nucleus combined to form heavier nucleus is

Answer 24

Fussion

Question 25

Heavier nucleus divided to form stable nucleus is

Answer 25

Fission

Question 26

What is Radioactivity?

Answer 26

Attain stability naturally

Question 27

Name three process of Radioactivity

Answer 27

Alpha decay -using alpha Beta decay-using ē Gamma decay-using gamma

Question 28

Nuclear fission ? And its process

Answer 28

Split of heavier nucleus to lighter nucleus *92 U²³⁵+0n¹>>>>92U²³⁶unstable *U>>>Ba+Kr+3(0n¹)+Energy *U>>>Nb+Sb+4(0n¹)+Energy *U>>>Xe+Sr+2(0n¹)+Energy

Question 29

Energy get from 1 Uranium is

Answer 29

216Mev

Question 30

Two type of chain nuclear Reaction

Answer 30

Uncontrolled Reaction Controlled Reaction

Question 31

What's happen in Uncontrolled Reaction

Answer 31

Energy increase without limit Used in Atom bomb

Question 32

What's happen in controlled Reaction

Answer 32

Energy is limited Used in nuclear reactor

Question 33

Why nuclear fussion is practically impossible

Answer 33

For start it required to break atom bomb Required high temperature

Question 34

Mainly nuclear fussion occur on?

Answer 34

Sun and star

Question 35

What are the name of following ē e+ (1-2)H v

Answer 35

Electron Positron 1H² Neutrino

Question 36

First step of proton-proton cycle

Answer 36

(1-1)H + (1-1)H >>>(1-2)H + e+ + v + 0.42Mev

Question 37

Second step of proton proton cycle

Answer 37

e+ + ē >>> √ + √ + 1.02Mev

Question 38

Third step of proton proton cycle

Answer 38

(1-2)H + (1-1)H >>>(2-3)He + √ + 5.49Mev

Question 39

Fourth step of proton proton cycle

Answer 39

(2-3)He + (2-3)He >> (2-4)He + (1-1)H + 12.86Mev

Question 40

Net reaction of proton proton cycle

Answer 40

4(1-1)H + 2ē >> (2-4)He + 2v + 6√ + 26.7 Mev