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Worksheets

SOA G8 SRM-1

Total questions: 50

Worksheet time: 26mins

Name
Class
Date
1.

Everything we see around is made up of

a)

Matter

b)

Stones

c)

Bricks

2.

Electrons were discovered by

a)

John dalton

b)

JJ thomson

3.

Which of the following scientists used cathode ray tube

a)

JJ Thomson

b)

James Chadwick

c)

Ernst Rutherford

4.

Plum pudding model is suggested by

a)

JJ Thomson

b)

John Dalton

c)

Ernst Rutherford

5.

Alpha particle consists of

a)

1 proton 1 neutron

b)

2 proton , 2 neutrons

c)

3 proton , 3 neutron

d)

4 proton , 4 neutron

6.

Alpha particle represents

a)

Helium atom

b)

Helium nucleus

c)

Electrons in th helium

7.

Neutrons were discovered by

a)

JJ Thomson

b)

Ernst Rutherford

c)

James Chadwick

8.

Which of the subatomic particles forms nucleus

a)

Electrons and protons

b)

Electrons and neutrons

c)

Protons and neutrons

d)

Protons and quarks

9.

The scientist who said atoms combine at atomic level

a)

John dalton

b)

JJ Thomson

c)

Rutherford

d)

James Chadwick

10.

In Rutherford's experiment , a circular fluorescent screen is made up of

a)

Zinc sulphate

b)

Znc sulphite

c)

Zinc sulphide

11.

Electrons revolve around an circular orbit called as

a)

Rings

b)

Mobile orbits

c)

Stationary orbits

12.

The combined atomic model of Rutherford and Neil Bohr is

a)

Plum pudding

b)

Planetary

c)

Bowling ball

d)

Watermelon

13.

Which of the following scientists followed the quantum theory

a)

Werner Heisenberg

b)

Ernst Rutherford

c)

Erwin Schrödinger

d)

John Dalton

14.

John dalton used a cathod ray tube to discover electron

a)

True

b)

False

15.

Cathode ray bent towards negative charge of the plate

a)

True

b)

False

16.

Cathode ray is

a)

Negatively charged

b)

Positively charged

17.

A cut water melon is an example of planetary model of atom

a)

True

b)

False

18.

According to Dalton

a)

Atoms of same element have different masses and same chemical properties

b)

Atoms of different atoms have different masses but same chemical properties

c)

Atoms of different elements have different atomic masses and chemical properties

19.

Which of the following is not considered as an subatomic particle

a)

Eectron

b)

Proton

c)

Neutron

d)

Quark

20.

Gold foil experiment is conducted by Ernst Rutherford

a)

True

b)

False

21.

Who used alpha particles in the proposal of an atomic model

a)

Ernst Rutherford

b)

JJ Thomson

c)

Werner Heisenberg

22.

In conclusion to Rutherford experiment, most of the gamma rays passed through atom indicating that the atom is mostly empty

a)

True

b)

False

23.

Atomic model which is close to current reality in some important ways is

a)

James Chadwick

b)

JJ Thomson

c)

Ernst Rutherford

d)

Neil Bohr

24.

Electrons carry _________ charge and neutrons _________ charge

a)

Positive , negative

b)

Negative , positive

25.

The scientist who discovered the impossibility of certainty of electron magnitude and position is

a)

Ernst Rutherford

b)

Werner Heisenberg

c)

Erwin Schrödinger

26.

The theory which proposed that electron is not only a particle of wave but both

a)

Planetary theory

b)

Neil Bohr theory

c)

Quantum theory

27.

Atomic number is defined as the number of ___________ and atomic mass is __________

a)

Potions , Electrons and neutrons

b)

Electrons , Protons and neutrons

c)

Protons , Protons and neutrons

28.

When an electron loses energy,

a)

It jumps from K shell to M shell

b)

I jumps from L shell to M shell

c)

It jumps from N shell to L shell

29.

Which of the sub atomic particle is electrically neutral

a)

Eectron

b)

Proton

c)

Neutron

30.

Quantum model is also known as

a)

Planetary model

b)

Cloud model

c)

Plum pudding model

31.

The region where electron is much more likely to be found is called as

a)

Orbit

b)

Orbital

c)

K shell

32.

A very few alpha particles bounced back due to striking

a)

Proton

b)

Electron

c)

Neutron

d)

Proton and neutron mass

33.

During Gold foil experiment Radioactive source is stored in

a)

Lead lined box

b)

Uranium lined box

c)

Thorium lined box

34.

Tiny solid sphere is an atomic model proposed by

a)

John dalton

b)

JJ Thomson

c)

Rutherford

35.

Neutrons has mass

a)

Slightly greater then proton

b)

Slightly lesser then proton

c)

Equal to electron

36.

Cathode rays travel from

a)

Cathode to anode

b)

Anode to cathode

37.

Who suggested that the nucleus is positively charged

a)

JJ Thomson

b)

John dalton

c)

East Rutherford

38.

Atomos means

a)

Uncuttable

b)

Indivisible

c)

Divisible

39.

Who said that the atoms combine in the simplest whole number ratio to form compounds

a)

John dalton

b)

Ernst Rutherford

c)

Werner Heisenberg

40.

Electrostatic arrangement is the net arrangement of

a)

Protons and neutrons

b)

Protons and electrons

c)

Neutrons and electrons

41.

What are the short comings of Daltons atomic model

a)

Stability of atom

b)

Behaviour of one atom with another in terms of physical and chemical properties

c)

Both

42.

The positive charge that repelled alpha particles during gold foil experiment is

a)

Protons

b)

Nucleus

43.

The picture portrays

a)

Rutherfords atomic model

b)

Bohr’s atomic model

c)

Modern atomic model

44.

According to the theory of quantum mechanics, arrangement of electrons around the nucleus could only be described in terms of

a)

Stationary orbits

b)

Pobability

45.

Who inferred that there must be some positive charge inside the atom which balances negative charge of electrons

a)

John Dalton

b)

JJ Thomson

c)

Ernst Rutherford

46.

The diagram suggests the

a)

Discovery of electron

b)

Cathode ray is negatively charged

c)

Discovery of protons

47.

The scientists who used alpha particles in the discovery and study of subatomic particles

a)

JJ Thomson and Ernst Rutherford

b)

James Chadwick and Ernst Rutherford

c)

Ernst Rutherford and Erwin Schrödinger

48.

Alpha particle is positively charged because

a)

It has 2 neutrons and 2 electrons

b)

It has 2 protons and 2 neutrons

c)

It has 2 neutrons and 2 quarks

49.

Which model of atom was unable to explain the exact position of electrons

a)

Modern atomic model

b)

Bohr’s atomic model

c)

Quantum mechanical model of atom

50.

The mathematical principles that explained the behaviour electromagnetic energy is put forth by

a)

Ernst Rutherford and Neil Bohr

b)

Max plank and Albert Einstein

c)

Erwin Schrödinger and Werner Heisenberg