Chemistry Final ACS Exam Questions and Answers(A+ Solution guide)

Accuracy? - Closeness of measurements to the TRUE VALUE of what is being measured Precision? - Closeness of a SET of measurements How do you calculate Percent Error? - I experimental-accepted I ____________________ x 100 accepted value Are zeros infront of non-zero digis significant? - Nope! ex: 0.0071 is only 2 sig figs Are zeros at the end of a number and to the right of the decimal significant? - Yep! ex: 9.100 is 4 sig figs Addition/Subtraction in regards to sig figs? - Round numbers to the least number of decimal places Multiplaction/Division in regards to sig figs? - Round answers to the least amount of sig figs # of e- equal - the # of p+ Atomic Mass? - Number of protons in the nucleus (number on the left bottom corner of the chemical symbol) Atomic Mass Number? - Number of protons and neutrons (number on the left upper corner of the chemical symbol)Isotope? - Atoms of the same element, but with different masses (different number of neutrons) STUDY ELECTRON CONFIGURATIONS - STUDY ELECTRON CONFIGURATIONS