(B) The electronic configuration of the elements are:$Na$ $(Z=11)$: $1s^2 2s^2 2p^6 3s^1$ (Period $3$)$Cl$ $(Z=17)$: $1s^2 2s^2 2p^6 3s^2 3p^5$ (Perio

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(B) The electronic configuration of the elements are:$Na$ $(Z=11)$: $1s^2 2s^2 2p^6 3s^1$ (Period $3$)$Cl$ $(Z=17)$: $1s^2 2s^2 2p^6 3s^2 3p^5$ (Period $3$)$Ca$ $(Z=20)$: $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$ (Period $4$)$Br$ $(Z=35)$: $1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4p^5$ (Period $4$)Therefore,$Na$ and $Cl$ both belong to period $3$.

Class 11 Chemistry Classification of Elements and Periodicity in Properties Extended or long form of periodic table

Easy

Which of the following pairs has both members from the same period of the periodic table?

A
$Na - Ca$
B
$Na - Cl$
C
$Ca - Cl$
D
$Cl - Br$

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Class 11

Chemistry Questions

Chapter

Classification of Elements and Periodicity in Properties

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Extended or long form of periodic table

In which of the following groups would placing Helium satisfy all its properties?

Easy

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Which of the following electronic configurations represents representative elements?

Medium

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In what manner is the long form of periodic table better than Mendeleev's periodic table? Explain with examples.

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Which elements are placed outside at the bottom of the extended periodic table?

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The element with the lowest atomic number that has a ground state electronic configuration of $(n - 1)d^6 ns^2$ is located in the

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Which of the following pairs has both members from the same period of the periodic table?

Similar Questions

In which of the following groups would placing Helium satisfy all its properties?

Which of the following electronic configurations represents representative elements?

In what manner is the long form of periodic table better than Mendeleev's periodic table? Explain with examples.

Which elements are placed outside at the bottom of the extended periodic table?

The element with the lowest atomic number that has a ground state electronic configuration of $(n - 1)d^6 ns^2$ is located in the

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