David S Day 19

 4/6. 

1. Queen of hearts :), D12. The date of the book got me there. 
2. Staten Island :), D10. Gimme for me, but may play hard. 
3. Primary Indo European :(, D33. So close…
4. Helium :), D21. Only two choices, and I just couldn’t imagine it took this long to discover hydrogen. 
5. Oppenheimer :), D01. Love this question. I spent a while on it but figured it had to be this. 
6. Fogg :(, D22. Now that I see the answer I remember!