These two compounds are in the liquid phase at 293 k
a. br₂ and hg
b. cl2 and f2
c. nh4^{+} and h₃o^{+}
d. fe and co
e. diamond and graphite

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

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?

What state of matter is ice a. liquid b. element c. solid d. gas