4 I acutally knew. Quite pleased with better than random results for the rest.
Mostly based on having some idea of many of their personalities.
1 wrong. It didn't sound like anything a serious scientist would say, so I put down Cabeus, the only one I have never heard of.
6 wrong, but it was half and half getting between Bohr and Azimov
7 right. Guessed Hawking, based on banality of thought and expression
10 right. Clearly said by an experimental scientist
11 right. Dirac had that sort of philistine purism and was essentially autistic; maths was beautiful to him, but not music because it had too many unnecessary or arbitrary twiddly bits; the unliteralness of poetic meaning he probably would have been uncomfortable with.
12 wrong. I put Bardeen of whom I know little. I thought a bit about Feynman, but decided it was a tad too banal for him, and not quite what he would have said, but he did also play to the crowd bit.