Extremely difficult crossword (only geniuses can win) >:) GL

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Across
  1. 2. some galaxies have this in their center instead of a supermassive black hole
  2. 6. protons and neutrons are made of quarks and _______
  3. 9. the event when AI takes over is the ______ singularity
  4. 10. the product of iron heated with carbon and limestone
  5. 11. the X-43A Hyper-X plane's top speed is ______ thousand km/h
Down
  1. 1. Ton 618 is a _________ black hole
  2. 3. the center of a black hole
  3. 4. computers that use qubits are called _____ computers
  4. 5. the math operation represented by an ! mark
  5. 7. the first computer ever invented
  6. 8. this math operation reverses exponents