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Periodic system of elements problems and solutions

  1. What element is located in Group 1, Period 4 of the periodic table? Solution: The element located in Group 1, Period 4 is Potassium (K).

  2. Which group contains the Alkali Metals? Solution: Group 1 contains the Alkali Metals.
  3. Which group contains the Noble Gases? Solution: Group 18 contains the Noble Gases.
  4. Which period is the Lanthanide series located in? Solution: The Lanthanide series is located in Period 6.
  5. What is the atomic number of Iron (Fe)? Solution: The atomic number of Iron is 26.
  6. What element is denoted by the symbol ‘Zn’? Solution: The element denoted by ‘Zn’ is Zinc.
  7. Which group and period does Silicon (Si) belong to? Solution: Silicon belongs to Group 14 and Period 3.
  8. What are the elements in Group 17 commonly referred to as? Solution: The elements in Group 17 are commonly referred to as the Halogens.
  9. Which period does Selenium (Se) belong to? Solution: Selenium belongs to Period 4.
  10. What is the atomic number of Bromine (Br)? Solution: The atomic number of Bromine is 35.
  11. What is the atomic mass of Carbon (C)? Solution: The atomic mass of Carbon is approximately 12.01 atomic mass units.
  12. Which element has the symbol ‘Ne’? Solution: The element with the symbol ‘Ne’ is Neon.
  13. Which group and period does Nitrogen (N) belong to? Solution: Nitrogen belongs to Group 15 and Period 2.
  14. What is the atomic number of Helium (He)? Solution: The atomic number of Helium is 2.
  15. Which period does Uranium (U) belong to? Solution: Uranium belongs to Period 7.
  16. What are the elements in the second period of the periodic table? Solution: The elements in the second period are Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), and Neon (Ne).
  17. Which group does Gold (Au) belong to? Solution: Gold belongs to Group 11.
  18. What is the atomic mass of Argon (Ar)? Solution: The atomic mass of Argon is approximately 39.95 atomic mass units.
  19. Which period does Lithium (Li) belong to? Solution: Lithium belongs to Period 2.
  20. What element is located in Group 16, Period 3 of the periodic table? Solution: The element located in Group 16, Period 3 is Sulfur (S).

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