This was because the experiment showed that a substance could emit radiation even while it was not exposed to light.
Answer:
Green
Explanation:
Positive: A strong green color in the flame indicates the presence of halogens (chloride, bromide, iodide but not fluoride).
Explanation:
The structure of Ferrarrisite Ca5(HAs O4)2(AsO4)2
The Plum Pudding Model is a model of atomic structure proposed by J.J. Thomson in the late 19th century. Thomson had discovered that atoms are composite objects, made of pieces with positive and negative charge, and that the negatively charged electrons within the atom were very small compared to the entire atom.