Class 11ChemistryClassification of Elements and Periodicity in PropertiesMix Examples - Classification of Elements and Periodicity in Properties
EasyWhich of the following statements is not correct regarding the classification of elements in the periodic table?
- AThe properties of elements are periodic functions of their atomic numbers.
- BThe number of non-metallic elements is not greater than the number of metallic elements.
- CThe first ionization energy of elements in a period does not change in a regular order with atomic number.
- DFor transition elements,electrons are filled one by one into the $d$-subshell with an increase in atomic number.
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Similar Questions
Which of the following is not a periodic property?
Assertion : Best diagonal relationship is shown between $Be$ and $Al$.
Reason : Ionization energy of $Be$ is almost the same as that of $Al$.
Reason : Ionization energy of $Be$ is almost the same as that of $Al$.
DifficultAIIMS 2013
View SolutionCompare the ionization enthalpy and electron gain enthalpy values of the elements given below:
Element Description Element $\Delta_{i}H_1$ $\Delta_{i}H_2$ $\Delta_{eg}H$ $(i)$ Most reactive non-metal $(A)$ $419$ $3051$ $-48$ $(ii)$ Most reactive metal $(B)$ $1681$ $3374$ $-328$ $(iii)$ Least reactive element $(C)$ $738$ $1451$ $-40$ $(iv)$ Metal forming dihalide $(D)$ $2372$ $5251$ $+48$
| Element Description | Element | $\Delta_{i}H_1$ | $\Delta_{i}H_2$ | $\Delta_{eg}H$ |
| $(i)$ Most reactive non-metal | $(A)$ | $419$ | $3051$ | $-48$ |
| $(ii)$ Most reactive metal | $(B)$ | $1681$ | $3374$ | $-328$ |
| $(iii)$ Least reactive element | $(C)$ | $738$ | $1451$ | $-40$ |
| $(iv)$ Metal forming dihalide | $(D)$ | $2372$ | $5251$ | $+48$ |
Medium
View SolutionThe electronic configurations of four elements are:
$I. [Xe] \, 6s^1$
$II. [Xe] \, 4f^{14} \, 5d^1 \, 6s^2$
$III. [Ar] \, 4s^2 \, 4p^5$
$IV. [Ar] \, 3d^7 \, 4s^2$
Select the incorrect statement about these elements.
$I. [Xe] \, 6s^1$
$II. [Xe] \, 4f^{14} \, 5d^1 \, 6s^2$
$III. [Ar] \, 4s^2 \, 4p^5$
$IV. [Ar] \, 3d^7 \, 4s^2$
Select the incorrect statement about these elements.
Difficult
View SolutionAssign true $(T)$ or false $(F)$ for the following statements and select the correct option for your answer:
$(I)$ $I.P.$ of $O_{(g)}$ is less than $I.P.$ of $O^{-}_{(g)}$
$(II)$ $I.P.$ of $Ne_{(g)}$ is greater than $I.P.$ of $Ne^{+}_{(g)}$
$(III)$ $E.A.$ of $O^{+}_{(g)}$ is greater than $E.A.$ of $O_{(g)}$
$(IV)$ $I.P.$ of $N_{(g)}$ is greater than $I.P.$ of $N^{+}_{(g)}$
$(I)$ $I.P.$ of $O_{(g)}$ is less than $I.P.$ of $O^{-}_{(g)}$
$(II)$ $I.P.$ of $Ne_{(g)}$ is greater than $I.P.$ of $Ne^{+}_{(g)}$
$(III)$ $E.A.$ of $O^{+}_{(g)}$ is greater than $E.A.$ of $O_{(g)}$
$(IV)$ $I.P.$ of $N_{(g)}$ is greater than $I.P.$ of $N^{+}_{(g)}$
Difficult
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