8.1 Discovery of radioactivity

Who is the German physicist who discovered X-ray by iintentionally taken an X-ray photograph of his wife's hand.

• Henri Becquerel

• Pierre Curie

• Wilhelm Roentgen

Antoine Henri Becquerel is the first person to discover radioactivity by detecting the rays based on

• x-ray photograph

• ionising properties

• decay process

Marie curie discover gamma ray emitted from

• uranium

• radium

• phosphorus

Marie Curie died from the disease caused by prolonged exposure to

• alpha particle

• beta particle

• gamma ray

radioactivity is the process when unstable nucleus become more stable nucleus by emitting radioactive radiation. This process will happen in a

• continuous and fixed

• random and spontaneous

• continuous and spontaneous