Choose the word that best completes this sentence. welding in confined spaces and on stainless steel generates a very toxic chemical.

Welding in confined spaces and on stainless steel generates hexavalent chromium. Hexavalent chromium is a compound that is generally used in textile dyes and wood preservation. 

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.