In the modern quantum-based atomic theory, what is the name given to a particular space around the nucleus in which an electron moves?

What causes most sediment to wash or fall into a river

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)

How many neutrons does an element have if its atomic number is 50 and its mass number is 166