Which of the following statements is $NOT$ correct?

  • A
    $He$ has the highest $\Delta_iH_1$ among all elements.
  • B
    The $\Delta_{eg}H_1$ of noble gases is zero or positive.
  • C
    Fluorine has the highest electronegativity.
  • D
    The $\Delta_iH_1$ value for nitrogen is lower than that of oxygen.

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Similar Questions

Choose the correct statement$(s)$.

Which has maximum $EA$,$EN$ and $IP$ respectively $:-$
$A = 1s^2 \ 2s^2 \ 2p^6$
$B = 1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^5$
$C = 1s^2 \ 2s^2 \ 2p^5$
$D = 1s^2 \ 2s^2 \ 2p^6 \ 3s^1$

What are the differences between the first element of a group and the subsequent elements in the same group?

Which of the following statements are $NOT$ true about the periodic table?
$A.$ The properties of elements are a function of atomic weights.
$B.$ The properties of elements are a function of atomic numbers.
$C.$ Elements having similar outer electronic configuration are arranged in the same period.
$D.$ An element's location reflects the quantum numbers of the last filled orbital.
$E.$ The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled.
Choose the correct answer from the options given below:

State whether the following statements are true or false:
$(i)$ As the atomic number increases in a period,the nuclear charge increases,therefore the ionization enthalpy increases.
$(ii)$ As the metallic character of elements increases,the atomic radius generally increases.
$(iii)$ $Mn$ $(Z = 25)$ is a transition element. Although it is a $3d$-orbital element,its position in the periodic table is in the $4^{th}$ period.

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