Elements for which there are no data will always give a value of zero for the weight. All thallium compounds are to be avoided and should only be handled by competent personnel taking proper precautions. Thallium compounds are extremely toxic. Their effects are cumulative and they can be absorbed though the skin. Thallium poisoning takes several days to act and it affects the nervous system.
Thallium compounds are teratogenic.
Three of the these are bromine, caesium and gallium. Select the description best fitting the geometry of ClF 3 . All rights reserved.