Match the following -begin array -c- c - Whe Element-Substance - AtomicitylWhlinei Hydrogen - A 3 Whlineii Argon - B 6Whlineiii Sulphur - C Diatomic II Whlineiv Carbon ispace dioxide - D Monoatomic Whlinev Ammonium ispace Chloride - E Polyatomic Whlinelendarray

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Standard X

Chemistry

Atomicity

Match the fol...

Question

Match the following :

$\begin{matrix} E l e m e n t / S u b s t a n c e & A t o m i c i t y (i) H y d r o g e n & (A) 3 (i i) A r g o n & (B) 6 (i i i) S u l p h u r & (C) D i a t o m i c (i v) C a r b o n d i o x i d e & (D) M o n o a t o m i c (v) A m m o n i u m C h l o r i d e & (E) P o l y a t o m i c \end{matrix}$

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Solution

The atomicity of a molecule is the number of atoms present in it. Elemental hydrogen ( $H_{2}$ ) is diatomic i.e. it has two hydrogen atoms. Elemental sulphur is polyatomic i.e. more than 4 atoms. Sulphur exists as $S_{6}$ , $S_{7}$ , $S_{8}$ , $S_{20}$ etc.molecules but $S_{8}$ is more common. Elemental argon exists as independent atoms. So it is monoatomic. Helium and neon are also monoatomic. Carbon dioxide ( ${C O}_{2}$ ) compound has 3 atoms. So its atomicity is 3 or triatomic.Ammonium chloride ( ${N H}_{4} C l$ ) compound has 6 atoms. So its atomicity is 6.

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Match the following : Element/SubstanceAtomicity(i)Hydrogen(A)3(ii)Argon(B)6(iii)Sulphur(C)Diatomic(iv)Carbon dioxide(D)Monoatomic(v)Ammonium Chloride(E)Polyatomic