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