Henri Becquerel, Marie Curie and Pierre Curie.
ruther ford
Henry Becquerel discovered radio-activity.
emitting from radioactive elements which can cause fogging photographic plate is called radioactivity
Radio-Activity was created in 1975-10.
marie curie
She discovered radio activity. These energies called polonium and radium are now used to treat cancer.
Marie Curie made significant contributions to the field of science, particularly in the fields of radioactivity and nuclear physics. She discovered the elements polonium and radium, pioneered research on radioactivity, and was the first woman to win a Nobel Prize. Curie's work laid the foundation for advancements in medical treatments, radiation therapy, and our understanding of atomic structure.
marconi
Lise Meitner an Austrian, later Swedish, physicist who worked on radio activity and nuclear physics. Meitner was part of the team that discovered nuclear fission.
No he was discovered on Youtube!!
He predicted that elements with the predicted properties would be discovered to fill in these gaps.
No elements were discovered in 1990. Two elements were discovered in 1994. They were Darmstadtium (atomic number 110) and Roentgenium (atomic number 111). Copernicium was discovered in 1996 and Fleroovium was discovered in 1999.