Uranium-232 has a half-life of 68.8 years. after 344.0 years, how much uranium-232 will remain from a 100.0-g sample?
1.56 g
3.13 g
5.00 g
20.0 g

Type the letter that represents the correct location for each particle type below.

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17