Class 11ChemistryClassification of Elements and Periodicity in PropertiesMix Examples - Classification of Elements and Periodicity in Properties
DifficultDescribe the periodicity of the first ionization enthalpy for elements with atomic numbers $1$ to $60$.
(N/A) Generally,ionization enthalpy refers to the first ionization enthalpy.
The first ionization enthalpies of elements with atomic numbers up to $60$ are plotted in the graph.
The periodicity of the graph is quite striking.
Maxima are observed at the noble gases,which have closed electron shells and very stable electron configurations.
Conversely,minima occur at the alkali metals,and their low ionization enthalpies can be correlated with their high reactivity.
Within a period,as we move from left to right,the ionization enthalpy generally increases.
Within a group,as we move from top to bottom,the ionization enthalpy generally decreases.
The first ionization enthalpies of elements with atomic numbers up to $60$ are plotted in the graph.
The periodicity of the graph is quite striking.
Maxima are observed at the noble gases,which have closed electron shells and very stable electron configurations.
Conversely,minima occur at the alkali metals,and their low ionization enthalpies can be correlated with their high reactivity.
Within a period,as we move from left to right,the ionization enthalpy generally increases.
Within a group,as we move from top to bottom,the ionization enthalpy generally decreases.
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Similar Questions
Which of the following statements are correct?
$(i)$ First ionisation enthalpy of $He < $ Second ionisation enthalpy of $Li$.
$(ii)$ $Li$ has the highest second ionisation enthalpy.
$(iii)$ All $d$-block elements are transition elements.
$(iv)$ The only alphabet not found in the periodic table is the letter '$J$'.
$(v)$ Francium concentration is $\sim 10^{-18} \ ppm$ on Earth.
$(i)$ First ionisation enthalpy of $He < $ Second ionisation enthalpy of $Li$.
$(ii)$ $Li$ has the highest second ionisation enthalpy.
$(iii)$ All $d$-block elements are transition elements.
$(iv)$ The only alphabet not found in the periodic table is the letter '$J$'.
$(v)$ Francium concentration is $\sim 10^{-18} \ ppm$ on Earth.
DifficultTS EAMCET 2018
View SolutionChoose the correct option regarding the following statements:
Statement-$1$: Nitrogen has lesser electron gain enthalpy than oxygen.
Statement-$2$: Oxygen has lesser ionization enthalpy than nitrogen.
Statement-$1$: Nitrogen has lesser electron gain enthalpy than oxygen.
Statement-$2$: Oxygen has lesser ionization enthalpy than nitrogen.
Observe the following statements:
$I$. The physical and chemical properties of elements are periodic functions of their electronic configuration.
$II$. Electronegativity of fluorine is less than the electronegativity of chlorine.
$III$. Electropositive nature decreases from top to bottom in a group.
The correct answer is:
$I$. The physical and chemical properties of elements are periodic functions of their electronic configuration.
$II$. Electronegativity of fluorine is less than the electronegativity of chlorine.
$III$. Electropositive nature decreases from top to bottom in a group.
The correct answer is:
Which has maximum $EA$,$EN$ and $IP$ respectively $:-$
$A = 1s^2 \ 2s^2 \ 2p^6$
$B = 1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^5$
$C = 1s^2 \ 2s^2 \ 2p^5$
$D = 1s^2 \ 2s^2 \ 2p^6 \ 3s^1$
$A = 1s^2 \ 2s^2 \ 2p^6$
$B = 1s^2 \ 2s^2 \ 2p^6 \ 3s^2 \ 3p^5$
$C = 1s^2 \ 2s^2 \ 2p^5$
$D = 1s^2 \ 2s^2 \ 2p^6 \ 3s^1$
Medium
View SolutionWhich of the following statements is correct?
Difficult
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