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.
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Who is known as the Father of the Periodic Table?
- Dmitri Mendeleev
- Isaac Newton
- Albert Einstein
- Marie Curie
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Answer: A. Dmitri Mendeleev
Dmitri Mendeleev is credited with the creation of the first periodic table.
Which element is located in Group 1 and Period 2 of the periodic table?
- Lithium
- Sodium
- Potassium
- Hydrogen
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Answer: A. Lithium
Lithium is in Group 1 and Period 2 of the periodic table.
What is the electron affinity trend across a period in the periodic table?
- Decreases
- Increases
- Remains constant
- None of the above
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Answer: B. Increases
Electron affinity generally increases across a period because the atoms become smaller and the nuclear charge increases, enhancing electron-electron attractions.
Which factor influences ionization energy the most?
- Nuclear charge
- Atomic radius
- Number of protons
- Electron configuration
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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.
What is the highest energy orbital for an element located in period 4?
- 4s
- 4d
- 4p
- 3d
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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.