In the following pictures representing binary hydrides AHx,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
Definitions:
Pesticide Residues
The traces of chemicals left on or in crops and food products after pesticide application, which can have health implications.
Food Quality Protection Act
A 1996 federal law that set pesticide limits in food, & all active and inactive ingredients must meet safety standards for infants and children.
Toxic Substances Control Act
U.S. legislation enacted to regulate the introduction of new or already existing chemicals, with the aim of protecting human health and the environment.
Unreasonable Risk
A situation or action that exposes individuals to a significant potential for harm that is not justified by the possible benefits.
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