Thomson's Model of an Atom
Trending Questions
Why the nucleus of an atom is positively charged ?
On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole?
In Rutherfords experiment, a thin gold foil was bombarded with alpha particles. According to Thomsons plum-pudding model of the atom, what should have happened?
What are electrically neutral particles?
Why did Einstein write a letter to Franklin Roosevelt?
Differentiate between the three subatomic particles.
The first model of an atom was given by:
Neils Bohr
Ernest Rutherford
J.J.Thomson
Eugen Goldstein
Match the names of the Scientists given in Column A with their contributions towards the understanding of the atomic structure as given in Column B.
A B
(a) Ernest Rutherford (i) Indivisibility of atoms
(b) J.J.Thomson (ii) Stationary orbits
(c) Dalton (iii) Concept of nucleus
(d) Neils Bohr (iv) Discovery of electrons
(e) James Chadwick (v) Atomic number
(f) E. Goldstein (vi) Neutron
(g) Mosley (vii) Canal rays
In the Thomsons model of atom, which of the following statements are correct?
(i) The mass of the atom is assumed to be uniformly distributed over the atom.
(ii) The positive charge is assumed to be uniformly distributed over the atom.
(iii) The electrons are uniformly distributed in the positively charged sphere.
(iv) The electrons attract each other to stabilize the atom.
(i), (ii) and (iii)
(i) and (iii)
(i) and (iv)
(ii), (iii) and (iv)
Watermelon Model of atom was proposed by
Bohr
Thomson
Rutherford
Sommerfield
Which of the following are the postulates of Thomson’s model of an atom?
An atom consists of a positively charged sphere and electrons are embedded in it.
The negative and positive charges are equal in magnitude.
An atom consists of a positively charged sphere and neutrons are embedded in it.
An atom consists of a negatively charged sphere and neutrons are embedded in it.
State one observation which shows that atom is not indivisible.
Compare all the proposed models of an atom given in this chapter.
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
(i) Rutherford’s atomic model
(ii) Thomson’s atomic model
(iii) Bohr’s atomic model
(i), (ii) and (iii)
(ii), (iii) and (i)
(ii), (i) and (iii)
(iii), (ii) and (i)
State two observations which show that atom is not indivisible.
Why is high voltage and low pressure maintained in the discharge tube?
The subatomic particle electron was discovered by J.J. Thomson.
True
False
In the Thomson’s model of atom, which of the following statements are correct?
(i) the mass of the atom is assumed to be uniformly distributed over the atom.
(ii) the positive charge is assumed to be uniformly distributed over the atom.
(iii) the electrons are uniformly distributed in the positively charged sphere.
(iv) the electrons attract each other to stabilize the atom.
(i), (ii) and (iii)
(i) and (iii)
(i) and (iv)
(i), (iii) and (iv)
On the basis of Thomson's model of an atom, explain how an atom as a whole is neutral.
The fundamental particles present in equal numbers in neutral atoms are
neutron and electron
proton and neutron
electron and proton
proton and positron
Reason (R): The mass of an electron is approximately negligible.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true and R is false.
(d) A is false and R is true.
[1 Mark]
Protons were discovered by J. J. Thomson. True or False
True
False
In what way is Rutherford’s atomic model different from that of Thomson’s atomic model?
The following picture represents which model of an atom?
Thomson model of an atom
Bohr's model of an Atom
Dalton's Theory
Rutherford's model of an atom
__________ is regarded as a universal particle.
How did the Heisenberg uncertainty principle contribute to the atomic model?
What was the first atomic model?
(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom?
(b) The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
What are bose Einstein condensate and plasma?How they could be obtained?With examples
