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No chemical compound of helium is known ...

No chemical compound of helium is known
Or Helium forms no real chemical compound.

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### Step-by-Step Solution: 1. **Understanding Helium's Electronic Configuration**: - Helium has an electronic configuration of \(1s^2\). This means it has two electrons in its outermost shell, which is the only shell it has. 2. **Noble Gas Configuration**: - Helium is a noble gas, and its \(1s^2\) configuration is very stable. Noble gases are known for their lack of reactivity due to their full valence shells. ...
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(a) Draw the structures of the following molecules : (i) N_(2)O_(5) (ii) HCIO_(4) (b) Explain the following observations : (i) H_(2)S is more acidic than H_(2)O . Fluorine does not exhibit any positive oxidation state . (iii) Helium forms no real chemical compound.

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Knowledge Check

  • The chemical symbol for helium is

    A
    `He_(2)`
    B
    `He`
    C
    `He^(+)`
    D
    `He^(2+)`

  • Fluorine forms chemical compounds with

    A
    He
    B
    Ne
    C
    Ar
    D
    Xe

  • Holme's signal uses chemical compound

    A
    calcium carbide
    B
    calcium phosphide
    C
    calcium carbide and calcium phosphide
    D
    calcium carbide and aluminium carbide.

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    Why do not helium, neon and argon form chemical compounds ?

    (a) Draw the structures of the following : (i) PCl_(5) (s) (ii) SO_(3)^(2-) Explain the following observations : (i) Ammonia has a higher boiling point than phosphin. (ii) Helium does not form any chemical compound. (iii) Bi (V) is a stronger oxidising agent than Sb (V).

    Unlike xenon, no distinct chemical compound of helium is known. Give reason.

    Assign reason for the following: of the noble gas, only xenon is known to form well-established chemical compounds.

    Name two chemical compounds used in treatment of cancer.

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