Posted On : 20-Feb-2018

Q1: Who is credited with the discovery of electron?

• A. JJ Thomson
• B. James Chadwick
• C. Ernest Rutherford
• D. Niels Bohr

Q2: An atom has a mass number of 37 and atomic number 17. How many protons does it have?

• A. 20
• B. 17
• C. 54
• D. 21

Q3: Which of the following mostly accounts for the mass of an atom?

• A. neutrons
• B. neutron and proton
• C. electron and proton
• D. electron and neutron

Q4: Within an atom, the nucleus when compared to the extra nuclear part is

• A. bigger in volume and heavier in mass
• B. smaller in volume but heavier in mass
• C. smaller in volume and lighter in mass
• D. same size

Q5: What would be the atomic number of the element in whose atom the K and L shells are full?

• A. 10
• B. 12
• C. 14
• D. 16

Q6: Which metal was used by Rutherford in his alpha-scattering experiment?

• A. gold
• B. platinum
• C. silver
• D. lead

Q7: An element has an electronic configuration of 2, 8, 7. Its valency is

• A. 2
• B. 7
• C. 3
• D. 1

Q8: During a chemical reaction, atomic number

• A. changes
• B. remains same
• C. changes and then is restored
• D. changes alternately

Q9: Which isotope of hydrogen contains only one proton and no neutron in its nucleus?

• A. protium
• B. deuterium
• C. tritium
• D. None of the above

Q10: Who of the following was awarded the Nobel Prize for his measurement of elementary electronic charge?

• A. Rutherford
• B. Robert Millikan
• C. James Chadwick
• D. JJ Thomson