What are the forms of chemical agents?

The identification of the forms of chemical agents is crucial in understanding how they can be deployed and their potential effects. The correct choice categorizes chemical agents into four distinct states: vapors, solids, liquids, and gases.

Vapors refer to substances that are in the gaseous phase but originate from solids or liquids, and they can disperse rapidly in the air. Solids maintain a fixed shape and are not easily spread unless manipulated. Liquids can spread out and form pools or mists, while gases are fully dispersed in the atmosphere. Recognizing these states helps in assessing the methods of exposure, the protective measures needed, and the overall response to a chemical agent incident.

Other options present categories or forms that are not universally recognized as standard classifications for chemical agents. For instance, smart, neutral, lethal, and non-lethal denote the intent or effect rather than the physical state. Similarly, powders, gels, granules, and liquids focus more on the physical characteristics but don't encompass the full range of states as established by scientific consensus. Finally, capsules, tablets, sprays, and mists imply delivery methods rather than the elemental forms of the chemical agents themselves. Thus, the distinction provided in the correct answer aligns with established scientific understanding of