Discovery of radioacitivity Flashcards
What did Marie Curie discover?
She established the nature of radioactive materials
she showed how radioactive compounds could be separated and identified
How did Henri Becquerel investigate radioacitivity? before Marie Curie
investigating materials that glow when placed in an x-ray beam
he wanted to find out if strong sunlight could make uranium salts grow
What did Henri Becquerel discover?
he prepared a sample and placed it in a darawer on a wrapped photographic plate, ready to test the salts on the next sunny day
when he developed the film, he was amazed to see the image of a key - he placed it in the drawer and put the salts on top of the key
What conclusion did Henri Becquerel make?
uranium salts emit radiation which can penetrate paper and blacken a photographuc film
