The Periodic Table Quiz - ICSE Class 9 Chemistry

Free practice quiz: The Periodic Table (ICSE Class 9 Chemistry). 47 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 9 Chemistry practice quiz has 47 multiple-choice questions on The Periodic Table, and 47 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following elements exhibits the highest ionization enthalpy in the third period of the periodic table?

   1. Sodium (Na)
   2. Magnesium (Mg)
   3. Aluminum (Al)
   4. Chlorine (Cl)
   Show answer

   Answer: D. Chlorine (Cl)

   Ionization enthalpy generally increases across a period due to increasing effective nuclear charge, which holds the valence electrons more tightly. Chlorine has the highest effective nuclear charge in the third period, leading to the highest ionization enthalpy.

2. Which of the following oxides is amphoteric?

   1. Na₂O
   2. MgO
   3. Al₂O₃
   4. SO₂
   Show answer

   Answer: C. Al₂O₃

   Amphoteric oxides are those that can react with both acids and bases. Sodium oxide (Na₂O) and magnesium oxide (MgO) are basic oxides. Sulfur dioxide (SO₂) is an acidic oxide. Aluminum oxide (Al₂O₃) is an amphoteric oxide, reacting with acids to form salt and water, and with bases to form salts.

3. Which property generally increases as we move down Group 1 of the periodic table?

   1. Electronegativity
   2. Ionization enthalpy
   3. Reactivity
   4. Electron affinity
   Show answer

   Answer: C. Reactivity

   Reactivity of alkali metals (Group 1) increases down the group because the atomic size increases, and the valence electron is further from the nucleus and more easily lost. Electronegativity and ionization enthalpy decrease down the group, and electron affinity also generally decreases.

4. An element in Period 4 and Group 18 is:

   1. Argon (Ar)
   2. Krypton (Kr)
   3. Xenon (Xe)
   4. Radon (Rn)
   Show answer

   Answer: B. Krypton (Kr)

   Period 4 corresponds to the filling of the fourth electron shell. Group 18 elements are noble gases. Krypton (Kr) has atomic number 36 and its electronic configuration is 2, 8, 18, 8, which places it in Period 4 and Group 18.

5. An element with 7 protons and 7 neutrons in its nucleus has an atomic number of:

   1. 7
   2. 14
   3. 0
   4. 1
   Show answer

   Answer: A. 7

   The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element. The number of neutrons affects the mass number but not the atomic number.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Consider an element X which belongs to Group 2 and Period 4 of the periodic table. What is the likely electronic configuration of the outermost shell of X?
2. An element has an atomic number of 17. If it forms an ionic bond with an element from Group 1, what would be the likely formula of the resulting compound?
3. The element with atomic number 56 belongs to which of the following blocks of the periodic table?
4. Which trend is observed for electronegativity across a period in the periodic table?
5. An element 'A' has electronic configuration 2, 8, 7. Element 'B' has electronic configuration 2, 8, 8, 1. What type of bond will be formed between A and B?
6. Which of the following is NOT a characteristic of noble gases?
7. The metallic character of elements in a group generally:
8. An element has the electronic configuration 2, 8, 18, 1. It belongs to which period and block of the periodic table?
9. The element with atomic number 35 is located in which group of the periodic table?
10. Which of the following elements has the smallest atomic radius?
11. An element forms a stable oxide with the formula XO. This element is likely to be:
12. An element has 3 valence electrons and is in Period 3. What is its atomic number and symbol?
13. Elements in the same vertical column (group) of the periodic table have:
14. Which of the following ions would have the largest radius?
15. The first element in the d-block of the periodic table is:
16. An element X has atomic number 16. It will form an ion with charge:
17. An element has the electron configuration 1s²2s²2p⁶3s²3p⁴. This element belongs to which group and period?
18. Which of the following elements has the highest electronegativity?
19. The electronic configuration of an element is 2, 8, 18, 8, 1. This element belongs to:
20. Metals generally have:
21. An element with atomic number 20 has which of the following properties?
22. Which of the following is a metalloid?
23. The element with electronic configuration 2, 8, 5 belongs to:
24. The tendency of an atom to attract the shared pair of electrons towards itself is called:
25. Which of the following elements has the largest atomic radius?
26. Which of the following trends is INCORRECT regarding elements in the same period?
27. An element 'M' forms an oxide M₂O₃. This element is likely from which group?
28. Which of the following has the smallest ionization enthalpy?
29. An element with atomic number 18 is:
30. Which of the following pairs of elements will form an ionic compound?
31. The element found in Period 5, Group 16 is:
32. The number of electrons in the outermost shell of an atom determines its:
33. Which element is expected to have the highest electron affinity?
34. Which of the following is a characteristic of non-metals?
35. An element has atomic number 13. It is placed in which block and group?
36. The atomic radius of elements decreases across a period because:
37. Which of the following elements has the most metallic character?
38. An element with atomic number 19 belongs to:
39. An element 'X' has the electronic configuration 2, 8, 8, 2. It will react with element 'Y' having electronic configuration 2, 8, 7 to form a compound with the formula:
40. Which of the following is a property of elements in the p-block?
41. The trend in atomic size as you move from left to right across a period is primarily due to:
42. Which element is known as a chalcogen?

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