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Which of the following statements is/are...

Which of the following statements is/are true about the modern form of periodic table?

A

Third group of periodic table accommodates maximum number of elements.

B

Due to presence of half filled and fully filled sub shells in electronic configuration electronegativity of atom increases

C

The element of 13 th group and 7th period will have atomic number 113.

D

Diagonal relationship in 2nd and 3rd period element is found due to similar charge to size ratio

Text Solution

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The correct Answer is:
A, C, D
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Knowledge Check

  • Which of the following statements is/are true for the long form of the periodic table?

    A
    It refers the sequence of filling the electrons in the order of sub-energy level `s,p,d and f`
    B
    It helps to predict the stable valency states of the elements.
    C
    It refers trends in physical and chemical properties of the elements.
    D
    It helps to predict the relativity ionicity of the bond between any two elements.

  • Which of the following statements (s) about the modern periodic table are incorrect ? (i) The elements in the modern periodic table are arranged on the basis of their decreasing atomic numbers (ii) The elements in the modern periodic table are arranged on the basiss of their increasing atomic mases. (iii) Isotopes are placed in adjoining group(s) in the periodic table (iv) The elements in the modern periodic table are arranged on the basis of their increasing atomic number.

    A
    Only (i)
    B
    (i),(ii) and (iii)
    C
    (i), (ii) and (iv)
    D
    Only (iv)

  • Which of the following statements related to the modern periodic table is incorrect?

    A
    The p block has 6 columns because a maximum of 6 electrons can occupy all the orbitals in p subshell
    B
    The d block has 8 columns because a maximum of 8 electrons can occupy all the orbitals in p subshell
    C
    each block contains a number of columns equal to the number of electrons that can occupy that subshell
    D
    The block indicates value of azimuthal quantum number (l)for the last subshell that receives electrons in building up the electronic configuration

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    Which of the following statements is not correct about modificd Mendeleev's periodic table?

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