Test Details

Structure Of The Atom

Jan 17, 11:00 AM

30 minutes

Jan 17, 11:30 AM

30.0 marks

MCQ

15 questions

Prabhat shakti

MSc, BEd

Class Details

Chemistry

Target NEET

Chemistry

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Question Text

Question 1 :
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

Question 2 :
Which of the following scientist identified the 'Electrons' in the structure of an atom ?

Question 3 :
Which of the following is true for an element? (i) Atomic number = number of protons + number of electrons (ii) Mass number = number of protons + number of neutrons (iii) Atomic mass = number of protons = number of neutrons (iv) Atomic number = number of protons = number of electrons.

Question 4 :
The ratio of the radii of hydrogen atom and its nucleus is ~ $10^{5}$. Assuming the atom and the nucleus to be spherical, what will be the ratio of their sizes ?

Question 5 :
One electron is present in the outer most shell of the atom of an element X. What would be the value of charge on the ion formed if this electron is removed from the outermost shell ?

Question 6 :
Rutherford’s $\alpha$–particle scattering experiment showed that (i) electrons have negative charge (ii) the mass and positive charge of the atom is concentrated in the nucleus (iii) neutron exists in the nucleus (iv) most of the space in atom is empty Which of the above statements are correct?

Question 7 :
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Question 8 :
Which of the following scientist identified the 'Canal rays' in the structure of an atom ?

Question 9 :
Which of the following scientist identified the 'Atomic number' in the structure of an atom ?

Question 11 :
Which of the following is true for an element? (i) Atomic number = number of protons + number of electrons (ii) Mass number = number of protons + number of neutrons (iii) Atomic mass = number of protons = number of neutrons (iv) Atomic number = number of protons = number of electrons.

Question 12 :
The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element?

Question 13 :
An atom with 3 protons and 4 neutrons will have a valency of

Question 14 :
Helium atom has a valency of zero, even after having 2 electrons in its valence shell, because

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