Need this asap, I'll give brainliest. Determine which of the following electron configurations are not valid: State which rule has been violated.

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?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

Which subshell is represented by the actinides family?