|Table of contents|
|Multiple Choice Questions|
|Fill in the Blank|
|True or False|
|Very Short Answer Questions|
|Short Answer Questions|
Multiple Choice Questions
Q1: The nucleus of an atom consists of ______.
(b) Electrons and neutrons
(c) Protons and neutrons
Q2: What is the maximum number of electrons which can be present in K and L shells in an atom?
(a) 2 and 8
(b) 2 and 18
(c) 2 and 32
(d) 8 and 18
Q3: Rutherford's alpha-particle scattering experiment was responsible for the discovery of
(a) Atomic Nucleus
Q4: Isotopes of element have:
(a) The same physical properties
(b) Different chemical properties
(c) Different number of neutrons
(d) Different atomic numbers
Q5: Number of valence electrons in Cl– ion are:
Q6: An element has electronic configuration 2,8,4 it will be classified as
(b) Non metal
(d) None of these
Q7: Amongst element X (2,8,6) and (2,8,8) which is more reactive and why ?
(a) X because it is a metal
(b) Y because it is non metal
(c) X because it has 6 valence electrons
(d) Y because it is gas
Q8: The nucleus of the hydrogen atom is called as
Q9: Cathode raysget deflected in a electric field towards
(a) Positive plate
(b) Negative Plate
(c) No deflection takes place
(d) First towards negative plate and then towards positive plate
Q10: The atomic number of an element ‘y’ is 20. The electronic configuration of the ion having inert gas configuration is
Q1: According to Maharishi Kanad, the tiniest to tiny particle of a pure substance is called _________.
Q2: An atom is the smallest unit of an element which takes part in a _________.
Q3: Mass of an electron is 1/1837 times less than the mass of one atom of__________.
Q4: The K-shell of any atom cannot have more than _________ electrons.
Q5: Isotopes are the atoms of ___________ element, having same atomic number but different mass number.
Q1: Radioactive isotope of iodine is used for making the medicine called tincture iodne.
Q2: J.J. Thomson proposed that the nucleus of an atom contains only nucleons.
Q3: The K-shell of any atom cannot have more than _________ electrons.
Q4: The innermost atomic shell can hold a maximum of 18 electons.
Q5: Nuclear chemistry has nothing to do with the electrons present in an atom.
Q1: Out of proton and neutron, which is heavier?
Q2: Were neutrons known at the time Rutherford performed the scattering experiment?
Q3: Why is proton so named?
Q4: What is the number of electrons in the valence shell of chlorine (Z = 17)?
Q5: What is the basic difference between the isotopes of an element?
|1. What is the structure of an atom?|
|2. How do protons and neutrons differ in an atom?|
|3. What is the role of electrons in an atom?|
|4. How are elements organized in the periodic table?|
|5. What are the subatomic particles and their charges?|