PLS I NEED UR HELP QUICK ILL BRAINLIST Nd gIVE U 5 star. answer in full sentence! 1) What subatomic particle is not found in the nucleus of the atom?

2) is there always the same number of neutrons as protons in an atom? Explain your answer with an example.

Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.