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In the modern long form of the periodic ...

In the modern long form of the periodic table, elements are arranged in the increasing order of

A

Atomic mass

B

Atomic number

C

Mass number

D

Metallic character.

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**Step-by-Step Solution:** 1. **Understanding the Modern Periodic Table**: The modern long form of the periodic table is structured to organize elements based on their atomic structure and properties. 2. **Atomic Number**: In the modern periodic table, elements are arranged in the increasing order of their atomic number. The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. 3. **Significance of Atomic Number**: The arrangement by atomic number reflects the periodic law, which states that the properties of elements are a periodic function of their atomic numbers. This means that elements with similar properties appear at regular intervals when arranged by atomic number. 4. **Rows and Columns**: In the periodic table, elements are placed in rows (periods) and columns (groups or families). The rows represent increasing atomic numbers, while the columns group elements with similar chemical properties. 5. **Conclusion**: Therefore, the correct answer to the question is that in the modern long form of the periodic table, elements are arranged in the increasing order of their atomic number. ---
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In the modern periodic table, elements are arranged in

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, s, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table Which of the element whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the periodic table ?

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In the long form of the periodic table, the transition metals are placed in

In the modern period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, the seven periods (1 to 7) have 2,8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. Which of the elements whose atomic numbers are given below, cannot be accommodated in the present set up of the long form of the pariodic table?

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What is the basis of the long form of the periodic table?

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In the long or modern form of the periodic table, the element in the periodic table have been divided into four blocks, s-p-d -and f -. Each period begins with the filling of new energy shell. Two series of f -block elements are placed at the bottom of the periodic table. Which of the following ions is most stable?

Knowledge Check

  • In the long form of the periodic table, the transition metals are placed in

    A
    s-block
    B
    f-block
    C
    d-block
    D
    s and p- block.

  • What is the basis of the long form of the periodic table?

    A
    Atomic mass
    B
    Atomic number
    C
    Atomic size
    D
    Metallic and nonmetallic character
    • NCERT FINGERTIPS ENGLISH-CLASSIFICATION OF ELEMENTS AND PERIODICITY -Assertion And Reason
    1. In the modern long form of the periodic table, elements are arranged i...

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    2. Assertion:According to mendeleev,the properties of elements are a peri...

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    3. Assertion:Atomic number is a more fundamental property of an element t...

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    4. Assertion:Atomic number of the element ununtrium is 113. Reason:Accor...

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    5. Assertion:In the present form of periodic table,the period number corr...

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    6. Assertion:The chemistry of the early actinoids is more comlicated than...

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    7. Assertion:The atomic size generally increases across a period and decr...

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    8. Assertion:Among isoelectronic species,the cation with the greater posi...

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    9. Assertion:On moving down the group the group,ionization enthalpy decre...

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    10. Assertion:For the elements O or F,the electron gain enthalpy is less n...

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    11. Assertion: Shielding effect increases as we go down the group. Reaso...

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    12. Assertion:Electronegativity is not a measurable quantity. Reason:The e...

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    13. Oxidation state of oxygen in OF(2) and Na(2)O is +2 and -2 respectivel...

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    14. Assertion:Boron can only form [BF(4)]^(-),whereas aluminium forms[AlF(...

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    15. Assertion:Metallic character is highest at the extremely left side of ...

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    16. Assertion:Na(2)O is basic whereas Cl(2)O(7) is acidic oxide. Reason:E...

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