Question

What did J. J. Thomson's 1897 experiments on electric discharge through gases show that atoms of different elements contain?

Options

• A series of bright lines

• A new noble gas known as thoron

• Negatively charged constituents called electrons

• Alpha-rays and beta-rays

Answer 1

The experiments showed that atoms of different elements contain negatively charged constituents called electrons. They also established that these electrons are identical for all atoms.