Home
Class 12
CHEMISTRY
Assertion : He and Be have similar valen...

Assertion : He and Be have similar valence shell electronic cofiguration `ns^(2)`
Reason :Both are chemically inert.

A

If both (A) and (R ) are correct and (R ) is the correct explanation of (A)

B

If both (A) and (R ) are correct,but (R ) is the correct explanation of (A)

C

If (A) is correct but (R ) is incorrect

D

If (A) is incorrect but (R ) is correct

Text Solution

Verified by Experts

The correct Answer is:
c
Correct Assertion : Electronic configuration of He is `1s^(2)` and that of Be is `1s^(2)2s^(2)`.
Promotional Banner

Topper's Solved these Questions

  • P-BLOCK GROUP 18 ELEMENTS - THE INERT GASES

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Integer)|7 Videos

  • P-BLOCK GROUP 18 ELEMENTS - THE INERT GASES

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Fill In The Blanks)|15 Videos

  • P-BLOCK GROUP 18 ELEMENTS - THE INERT GASES

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises (Single Correct)|71 Videos

  • P-BLOCK GROUP 17 ELEMENTS - THE HALOGEN FAMILY

    CENGAGE CHEMISTRY ENGLISH|Exercise True/False (Subjective)|14 Videos

  • QUALITATIVE INORGANIC SALT ANALYSIS

    CENGAGE CHEMISTRY ENGLISH|Exercise Viva Voce Questions And Part-C (Analysis Of Cations)|42 Videos

Similar Questions

Explore conceptually related problems

Assertion: Helium and beryllium have similar outer electronic configuration of the type ns^(2) . Reason: Both are chemically inert.

He and Be both have the same outer electronic configuration like ns^(2) type. Statement-2 : Both are chemically inert.

The atom having the valence shell electronic configuration 4s^(2) 4p^2 would be in

Answer the following on the basis of modern periodic table. (I) Group no. of elements with the valence shell ground state electron configuration ns^(2)np^(5) (II) Group no. of the elements with the valence shell ground state electron configuratio ns^(2)np^(3) (III) Group no. of the elements that have only three unpaired p electron in ground state (V) ground 3A elements.

Answer the following on the basis of modern periodic table. (I) Group no. of elements with the valence shell ground state electron configuration ns^(2)np^(5) (II) Group no. of the elements with the valence shell ground state electron configuratio ns^(2)np^(3) (III) Group no. of the elements that have only three unpaired p electron in ground state

Statement-1 : Argon is used in the laboratory for handling substances that are air-sensitive. Statement-2 : Argon is inert towards chemical reactivity due to the completely filled valence shell electronic configuration, high ionization enthalpy and more positive electron gain enthalpy.

Statement-1 :Helium and beryllium both are chemically inert. Statement-2 : Helium and beryllium have similar outer electronic configuration of the type ns^(2)

If the valence shell electronic structure for an element is ns^(2) np^(5) , this element will belong to the group of

Assertion : Noble gases have highest ionisation enthalpies in their respective periods. Reason : Noble gases have stable closed shell electronic configuration.

Assertion : Teflon is used to making oil seals, gaskets and non-stick surface coating . Reason : Teflon is chemically inert and resistant to attack by corrosive reagents.