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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.

Text Solution

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The correct Answer is:
**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 ?

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

    • Similar Questions

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