J. j. thompson (late 1800s):
8. what did thompson discover? 10
9. what is the charge of an electron? 2
10. what are cathode rays made of?
11. what was thompson working with when he discovered the electron

Well to my expert knowledge and my exquisite calculations i think the the negative ion # 412 is the key to sucess

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o