MCAT General Chemistry Questions with Correct Answers.

Nucleus Correct Answer protons are found here Protons Correct Answer found in the nucleus E = 1.6 ^10(-19) = ONE atomic mass unit +1 Elements are defined by the number of protons they contain If same element/ isotope - will have the same amount of these Atomic mass unit Correct Answer one proton Atomic number Correct Answer Z Equal to the number of protons found in an atom of that element Elements are defined by the number of protons they contain No matter if they are isotopes if it is the same element - they will have the same On the bottom of the A/Z X convention - will always stay the same Neutrons Correct Answer particles that are neutral Also found in the nucleus with the protons A element can have a variable amount of these - isotopes Mass number Correct Answer A Sum of the protons and the neutrons This can vary among the same element due to the changing of neutrons (protons never change) Electrons cannot be calculated in mass calculations due to how small/ massless they are On top of the A/Z X convention Isotopes Correct Answer atoms that share an atomic number but have different mass numbers due to a change in neutrons in the nucleus Because they have the same number of protons and electrons - they exhibit similar chemical properties