What is the difference between an atom's mass number and its atomic number

atomic mass is associated with the number of neutrons and protons are present in a particular nucleus of element. atomic number is usually a number of protons present in an element's nucleus, it's the average weight of an element and total number of nucleons in the atomic nucleus

po-215 i got it right on the quiz

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.