Chemistry 110 Hybrid Unit 2 Sm2020 (1).docx - Chemistry 110...

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Chemistry 110 Hybrid Unit 2 Summer 2020 Name_____________________________________ For Problems involving calculations: Be sure to show work (set-ups, conversion factors, formulas) usedLabel measurement units Round calculation answers to 3 Sig. figs.1.In the early 1800’s, the theorythat matter was composed of indivisibleatomswas proposed by (2)what scientist? _______________________And then, in the early 1900’s, this theorywas revised to indicate that atoms had a dense, positively charged nucleus. What scientistis credited with discovering the nucleus? _______________________2.Fill in the blanks with: proton, neutronor electron(8) What subatomic particle(s) is (are)in theNOTin the nucleus? __________________What particle is electrically positive? _________________________What particle is responsible for an atom’s identity? _____________________What particle can be gained, lost or shared by atoms? _______________________What particle is electrically negative? ______________________What subatomic particle has a mass of 1 amu and a charge of 0 esu? __________________When a cationis formed, the number of _____________ is greater thanthe number of ____________When a chemical reaction occurs, what subatomic particle(s) is/are) notinvolved? _________________3a.Use these atomic (isotopic) notationsto identify the number of each subatomic particle in these atoms. (15)

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