Periodic Classification of Elements Quiz - CBSE Class 10 Science

Free practice quiz: Periodic Classification of Elements (CBSE Class 10 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 10 Science practice quiz has 20 multiple-choice questions on Periodic Classification of Elements, and 20 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. Who is known as the Father of the Periodic Table?

   1. Dmitri Mendeleev
   2. Isaac Newton
   3. Albert Einstein
   4. Marie Curie
   Show answer

   Answer: A. Dmitri Mendeleev

   Dmitri Mendeleev is credited with the creation of the first periodic table.

2. Which element is located in Group 1 and Period 2 of the periodic table?

   1. Lithium
   2. Sodium
   3. Potassium
   4. Hydrogen
   Show answer

   Answer: A. Lithium

   Lithium is in Group 1 and Period 2 of the periodic table.

3. What is the electron affinity trend across a period in the periodic table?

   1. Decreases
   2. Increases
   3. Remains constant
   4. None of the above
   Show answer

   Answer: B. Increases

   Electron affinity generally increases across a period because the atoms become smaller and the nuclear charge increases, enhancing electron-electron attractions.

4. Which factor influences ionization energy the most?

   1. Nuclear charge
   2. Atomic radius
   3. Number of protons
   4. Electron configuration
   Show answer

   Answer: A. Nuclear charge

   Nuclear charge significantly affects ionization energy; higher nuclear charge means stronger attraction to electrons, thus higher energy is required to remove them.

5. What is the highest energy orbital for an element located in period 4?

   1. 4s
   2. 4d
   3. 4p
   4. 3d
   Show answer

   Answer: C. 4p

   For an element in period 4, the highest energy level will be 4p, as the 4s and 3d orbitals fill before 4p.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the primary criterion for arranging elements in the modern periodic table?
2. Which group in the periodic table is known as the noble gases?
3. How many periods are there in the modern periodic table?
4. What is the general electronic configuration for alkali metals?
5. Which element has the highest electronegativity?
6. Which of these elements is a transition metal?
7. How does atomic radius change as you move down a group in the periodic table?
8. Which element is expected to have the largest atomic radius in period 3?
9. What is the anomaly in periodic trends for noble gases?
10. In which period is the element with atomic number 56 located?
11. Which property is not a physical property of metals?
12. Which of the following does not belong to the alkaline earth metals?
13. Which rare earth element belongs to the Lanthanide series?
14. Which element in period 3 has the highest first ionization energy?
15. How many valence electrons are there in an element placed in group 16?

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