Chemistry Final ACS Exam solution with 100% updated answers!!

Accuracy? - correct answer️️Closeness of measurements to the TRUE VALUE of what is being measured Precision? - correct answer️️Closeness of a SET of measurements How do you calculate Percent Error? - correct answer️️I experimental-accepted I ____________________ x 100 accepted value Are zeros in front of non-zero digits significant? - correct answer️️Nope! ex: 0.0071 is only 2 sig figs Are zeros at the end of a number and to the right of the decimal significant? - correct answer️️Yep! ex: 9.100 is 4 sig figs Addition/Subtraction in regards to sig figs? - correct answer️️Round numbers to the least number of decimal places Multiplication/Division in regards to sig figs? - correct answer️️Round answers to the least amount of sig figs # of e- equal - correct answer️️the # of p+ Atomic Mass? - correct answer️️Number of protons in the nucleus (number on the left bottom corner of the chemical symbol) Atomic Mass Number? - correct answer️️Number of protons and neutrons (number on the left upper corner of the chemical symbol) Isotope? - correct answer️️Atoms of the same element, but with different masses (different number of neutrons) STUDY ELECTRON CONFIGURATIONS - correct answer️️STUDY ELECTRON CONFIGURATIONS Do columns or rows in the Periodic Table have similar patterns? - correct answer️️Columns (the "groups") have repeating patterns? Which area of the Periodic Table has greater metallicness? - correct answer️️Left and down has greater metallicness Which area of the PT has greater atomic size? - correct answer️️Left and down has a greater atomic size Which area of the PT has greater ionization energy? - correct answer️️Right side and up has greater ionization energy Which area of the PT has greater electronegativity? - correct answer️️Right side and up has greater electronegativity, except the Noble Gases of 0 electronegative Ionic Bonding? - correct answer️️Metal and a nonmetal. Give/take electrons Covalent bonding? - correct answer️️Nonmetal and a nonmetal. Share electrons. VSEPR Theory? - correct answer️️Valence Shell Electron Pair Repulsion aka Valence e- pairs stay as far apart as possible How do you determine polarity? - correct answer️️Use the chart that has electronegativity values, then subtract the elements in the compound from each other. Is water polar? - correct answer️️Yes! Combination Reaction? - correct answer️️A + B -- AB Decomposition Reaction? - correct answer️️AB -- A + B Single Replacement Reaction? - correct answer️️AB + C -- AC + B