Atomic Structure and Periodic Classification - Question Bank
1. What is the primary difference between isotopes of an element?
2. The number of protons in an atom determines its:
3. Which scientist proposed the nuclear model of the atom, where electrons orbit a dense nucleus?
4. What is the approximate charge of a neutron?
5. The element Krypton (Kr) is in which period?
6. Which of the following is an alkaline earth metal?
7. The element with atomic number 11 is:
8. What is the electronic configuration of Helium (He)?
9. The d-block elements are also known as:
10. Which of the following is a metalloid?
11. The modern periodic law states that the properties of elements are periodic functions of their:
12. Mendeleev's periodic table was primarily organized based on:
13. The concept of 'periodicity' in the periodic table refers to:
14. Which of the following elements has the most valence electrons?
15. The number of valence electrons in an atom determines its:
16. Lanthanides and Actinides are collectively known as:
17. Transition metals are characterized by the filling of which orbitals?
18. What is the symbol for the element that is in Period 4 and Group 18?
19. The element with electron configuration 1s²2s²2p⁶3s¹ is:
20. Which element is in Period 3 and Group 16?
21. The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of:
22. Hund's rule states that electrons will occupy orbitals:
23. The Aufbau principle states that in the ground state of an atom, electrons fill:
24. The electron configuration of an element describes:
25. A negatively charged ion is called a(n):
26. A positively charged ion is called a(n):
27. What is an ion?
28. Which element has the highest electronegativity?
29. Electronegativity is the measure of an atom's ability to:
30. Ionization energy is the energy required to:
31. The atomic radius generally:
32. What is the name of the element with the symbol 'K'?
33. Elements with properties intermediate between those of metals and nonmetals are called:
34. Which of the following is a nonmetal?
35. Elements that are typically shiny, malleable, ductile, and good conductors of heat and electricity are classified as:
36. Noble gases are found in which group?
37. Halogens belong to which group in the periodic table?
38. Which group of elements are known as the alkali metals?
39. Horizontal rows in the periodic table are called:
40. Elements in the same vertical column (group) of the periodic table have similar:
41. The periodic table is arranged in order of increasing:
42. Which element has the atomic number 1?
43. What is the approximate mass of a proton?
44. The region around the nucleus where an electron is likely to be found is called a(n):
45. Which model of the atom proposed that electrons orbit the nucleus in specific energy levels?
46. Atoms of the same element that have different numbers of neutrons are called:
47. What is the mass number of an atom?
48. Which subatomic particle carries a positive charge?
49. What is the atomic number of an element?
50. Who is credited with the discovery of the electron?