## Chemistry and Chemical Reactivity (9th Edition)

Atomic numbers $Tc: Z=43, Am: Z=95$, from the periodic table a) $Z=p^+=e^-=43$ $A=Z+n^0=99\rightarrow n^0=56$ 43 protons, 43 electrons, 56 neutrons b) $Z=p^+=e^-=95$ $A=Z+n^0=241\rightarrow n^0=146$ 95 protons, 95 electrons, 146 neutrons