Periodic Classification of Elements

Bihar Board Class 10 · Science · 26 past questions

1. Q1 2026

   Carbon belongs to which group of the periodic table ?

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2. Q2 2026

   How many periods are there in the periodic table ?

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3. Q3 2026

   What is the atomic mass of Boron ?

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4. Q4 2025

   Which was a defect of Mendeleev's periodic table ?

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5. Q5 2025

   Who among the following propounded the laws of octave ?

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6. Q6 2025

   Which of the following compounds would be the most basic ?

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7. Q7 2025

   Magnesium is a member of which group of the periodic table ?

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8. Q8 2025

   How many periods are there in the periodic table ?

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9. Q9 2024

   The atomic number of sodium is

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10. Q10 2024

    The atomic number of magnesium is 12. What is its valency ?

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11. Q11 2024

    On moving from right to left across the period of the modern periodic table, the atomic size

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12. Q12 2023

    The atomic number of potassium is 19. What is the valency ?

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13. Q13 2023

    What is the atomic number of fluorine ?

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14. Q14 2023

    Boron and aluminium belong to which group of elements in periodic table?

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15. Q15 2022

    The number of electrons in the valance shell of sulphur is

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16. Q16 2022

    Which property of elements is same in a period of Periodic Table ?

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17. Q17 2022

    Which one is a metal in the elements represented by the following symbols ?

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18. Q18 2022

    The number of elements in the first period of Periodic Table is

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19. Q19 2022

    द्वितीय आवर्त में तत्त्वों के लिए कौन-सा शेल बाह्यतम शेल है ?

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20. Q20 2022

    An element has two shells and both are completely filled with electrons. The element is

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21. Q21 2020

    The atomic number of sodium is

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22. Q22 2020

    The element of first group of the periodic table is

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23. Q23 2018

    In moving from left to right across the period of the modern periodic table, the atomic size -

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24. Q24 2018

    How many vertical column (Groups) are in modern periodic table?

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25. Q25 2017

    The number of horizontal rows in modern periodic table is –

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26. Q26 2016

    The members of 1st group of the periodic table are

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