Honors Chemistry Final Exam Review 2024 Questions and Answers 100% Pass

Honors Chemistry Final Exam Review 2024 Questions and Answers 100% Pass the number one decimal place smaller than the smallest given unit; must be estimated - Answer- Uncertain Number how repeatable and consistent a measurement is - Answer- Precision how close to the accepted value a measurement is - Answer- Accuracy The number of protons in an atom, unique to each element, used to define an element. - Answer- Atomic Number the mass of the nucleus. also protons+neutrons - Answer- Mass Number two atoms with the same number of protons but different numbers of neutrons - Answer- Isotope an element is a substance with only one type of atom. - Answer- element homogeneous means that the mixture is completely mixed so that the naked eye can't tell the two substances apart. Heterogeneous means that you can see the two different substances w/ naked eye. - Answer- Homogeneous vs. Heterogeneous mixture a natural process that certain elements undergo that alters their nuclei and gives off rays in the form of either charged particles or energy. - Answer- radioactivity 2 protons and 2 neutrons ⁴₂α least harmful radiation - Answer- alpha particles an electron ⁰₋₁β middle harmful radiation - Answer- beta particles most harmful radiation - Answer- gamma particles opposite of electron ⁰₁β - Answer- positron when an atom is bombarded by particles in order to change it into a different atom - Answer- transmutation the time it takes for half of a radioactive lump of stuff to go away - Answer- half-life 10^-1 - Answer- deci 10^-2 - Answer- centi 10^-3 - Answer- milli 10^-6 - Answer- micro 10^-9 - Answer- nano 10^1 - Answer- deca 10^3 - Answer- kilo 10^6 - Answer- mega 10^9 - Answer- giga mass of sample left after time T - Answer- MsubT initial mass - Answer- MsubO