4 NEUTRON POINTS

What element did William Crookes discover while observing green line in spectrum of selenium?

Fontaine Chu, Krystal Xie and Ryan Yu POINTS

was a frech physicist, chemist

the development of the theory of radioactivity

techniques for isolating radioactive isotopes

discovered polonium and radium

4 NEUTRON POINTS

What is a scientific tool that William Crookes invented?

4 NEUTRON POINTS

Who suggested a fourth state with extreme space between molecules that no collisions?

Fontaine Chu, Krystal Xie and Ryan Yu POINTS

was a Frech Physicist

work with his wife Irène Joliot-Curie

their discovery radioactive artificially

their discovery of the neutron and the positron