Which element of group 17 exists as a solid at 25°c and standard pressure?

Tell me the iupac name of the following compounds:

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.