Question

Which sample of matter has particles arranged in a crystalline structure A)Ne(g) B)Br2(l) C)NaCl(aq) D)CuSO4(s)

Answer 1

(c) Nacl is the correct answer for this given question

Answer 2

Answer: D) $CuSO_4 (s)$

Explanation: Crystalline solids are those solids in which constituent particles are arrange in definite geometric pattern in all the three dimensions. They consist of small crystals which has regular arrangement of particles.

Crystalline solids are ionic solids which consists of positive and negative ions in three dimensional space. Thus $CuSO_4$ which is an ionic compound has $Cu^{2+}$ and $SO_4$ held together by strong coulombic forces.

A) Ne is a noble hgas held together by vanderwaal forces.

B) $Br_2$ is a molecule of element formed by sharing of electrons and forms a covalent bond.

C) $NaCl(aq)$ : This is a ionic compound but it dissociates into ions when dissolved in water.

$NaCl\rightarrow Na^++Cl^-$