Which scientific phenomenon, discovered in the late 19th century, demonstrated that atoms are NOT indivisible?
ARadioactivity
BMagnetism
CThermal expansion
DDiffusion
Answer & Solution
Correct answer: A. Radioactivity
Radioactivity — the emission of invisible energy and particles from certain elements — showed atoms must be composed of smaller subatomic particles, contradicting Dalton's indivisibility claim.
Related questions
The second basic principle of preventing infectious disease, keeping the immune system worThe basic key to prevention of infectious diseases is:The recruitment of immune cells to infected tissue, causing swelling, pain and fever, is:The virus causing Japanese encephalitis, entering through a mosquito bite, infects the:Typhoid-causing bacteria entering through the mouth stay in the:Female mosquitoes bite because they need blood to:Animals like mosquitoes that carry infecting agents from a sick person to another host areAntibiotics do not work against viral infections because viruses: