The electronic structure 1s22s22p63523p64523d8 refers to the ground state of Kr.
Ni.
Pd.
Fe.
none of the above.
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Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Which characteristics can be used to differentiate star systems? check all that apply.