In the following pictures representing binary hydrides AH x ,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A.
-The binary hydride shown in picture (2)is classified as
A)covalent.
B)interstitial (metallic).
C)ionic.
D)None of these

Question

In the following pictures representing binary hydrides AH x ,lightly-shaded spheres represent H atoms or ions and darkly-shaded spheres represent atoms or ions of the other element,A. 
-The binary hydride shown in picture (2)is classified as
A)covalent. 
B)interstitial (metallic). 
C)ionic. 
D)None of these

Quizplus · Accepted Answer

Picture (2) shows a binary hydride where the A atom/ion is much larger than the H atom/ion, indicating that the bond is likely ionic. In ionic compounds, one atom/ion is much larger than the other, resulting in the formation of a crystal lattice where the oppositely charged ions are held together by electrostatic attraction. Covalent bonds occur between two nonmetals, and metallic bonds occur between metallic elements. Interstitial (metallic) hydrides occur when hydrogen atoms occupy interstitial sites in metallic lattice. However, picture (2) does not show a metallic lattice structure. Therefore, the best choice is C) ionic.

In the Following Pictures Representing Binary Hydrides AHx,lightly-Shaded Spheres Represent

In the Following Pictures Representing Binary Hydrides AH_x,lightly-Shaded Spheres Represent