Chemistry-Objective Related Question Answers
26. Heaviest sub atomic particle us?
Neutron
27. Lightest sub atomic particle is?
Electron
28. Moving particle of an atom is?
Electron
29. The charge of an Electron is?
Negative
30. Protons and Neutrons are collectively known as?
Nucleons
31. Chemical property of a substance is determined by?
Electrons
32. The smallest atom is?
Helium (He)
33. The simplest atom is?
Hydrogen (H)
34. Biggest known atom is?
Francium (Fr)
35. The unit of measuring mass of an atom is?
Atomic Mass Unit (amu)
36. 1 atomic mass unit is equal to?
1.6605 x 10^-27 Kg
37. The element used to find amu?
Carbon-12
38. Electron is discovered by?
J.J. Thomson
39. The name Electron was proposed by?
Stoney
40. Charge of an electron?
1.6 x 10^-19C (determined by Millikan)
41. Mass of electron?
9.1 x 10^-31 kg
42. Dual nature of electron?
Louis-de-broglie
43. Proton was discovered by?
Ernest Rutherford
44. The identity card of an element?
Proton
45. The mass of a proton is?
1.672 x 10-27 kg
46. The theory of Proton was presented by?
William Prout
47. Neutron was discovered by?
James Chadwick in 1932
48. The heaviest fundamental particle of an atom?
Neutron
49. The least stable particle?
Neutron
50. Chargeless particle of an atom?
Neutron
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