1. When did Rutherford published results of gold-foil experiment through which it was noticed that scattering becomes due to presence of rigid core inside nucleus of the atom?
2. Which of the following particles were made to fall on a thin gold foil by Ernest Rutherford?
3. Atoms of which of the following elements has more than one electron in its outermost shell?
4. How many protons are found in nucleus of Lithium?
5. Which of the following pair of number composition is/are correct?
I. Atomic Number – Number of Proton
II. Mass number – Sum of numbers of neutron and proton
6. Fe has 26 protons in its nucleus. What are the number of electrons in Fe²⁺ (II) ion?
7. What is the atomic mass of oxygen (expressed in ‘u’)?
8. Which of the following is not an isotope of the element hydrogen?
9. In any shell the difference between two electron to be done by?
10. The mass of an electron is nearly one upon _______ times that of a proton.
11. What is the difference between two electrons in an orbit?
12. Atomic number of an atom gives the number of which of the following?
13. What is the atomic number of nitrogen?
14. Electrons move around the nucleus in..........…. motion.
15. There are stable, negatively charged particles found in all atoms?
16. The size of the nucleus is approximately _______.
17. How many maximum electrons can be present in third or M-shell?
18. The general electronic configuration ns² np³ fits which of the following elements?
19. What is the atomic mass of oxygen (Which is represented in 'u')?
20. Which of the following is a polar molecule?
21. What happens when one s and one p orbital is hybridized?
22. The existence of isotopes was first suggested in 1913 by the radiochemist .........
23. What is atomic mass of nitrogen atom?
24. Which among the following is false about alpha particles?
25. Electron was discovered in the year 1897 by___
26. Atoms of same element having different mass numbers are called…………. ?
27. The antiparticle of an electron is?
28. What is the atomic number of chromium?
29. Which of the following statement is not correct with respect to Rutherford's atomic model?
30. Who discovered the neutron and its properties?
31. The first electron shell which is the nearest to the nucleus never holds more than 'n' electrons, where 'n' is equal to:
32. In the context of isotopes of any element, which of the following statements is not correct?
33. Which among the following is present inside the nucleus of an atom?
34. Which of the following is false?
35. Barium loses………. electrons to achieve noble gas electronic configuration?
36. Which of the following is NOT positively charged?
37. The mass of proton and mass of ………is same.
38. The number of protons in a Lithium nucleus is:
39. Protium, deuterium and tritium are the naturally occurring isotopes of:
40. Neutrons are present in the nucleus of all atoms EXCEPT in those of _____.
41. How many protons are there in a lithium nucleus?
42. How many types of isotopes does Scandium have?
43. Cathode rays are a ray of ____.
44. In 1904 who discovered plum-pudding model of atom, according to which positive charge is spread over a sphere and electrons are embedded to the positive charge as resins are scattered in plum-pudding?
45. Which of the following represents an alpha particle?
46. Which of the following scientists discovered the electron in 1897?
47. The existence of isotopes was first suggested in 1913 by the radiochemist .........?
48. Which of the following property of a proton cannot change while it moves freely in magnetic field?
49. Chemical properties of isotopes ............ ?
50. All isotopes of the same element have --------?
