Question 1 of 3:
{# The page sits on a black background, so the frame brings its own white card -- the exercise image used to supply one. #}
\isotope[238][94]{Pu}
\isotope[239][94]{Pu}
\isotope[240][94]{Pu}
\isotope[242][94]{Pu}
\isotope[241][95]{Am}
\isotope[243][95]{Am}