Question

What are Moseley's EXPERIMENTS?

Answer 1

Henry Moseley found and measured a property linked to Periodic Table position. Hence atomic number became more meaningful and the three pairs of elements that seemed to be in the wrong order could be explained.

Moseley used what was then brand-new technology in his experiments. A device now called an electron gun had just been developed. He used this to fire a stream of electrons (like machine gun bullets) at samples of different elements. He found that the elements gave off X-rays. (This is how the X-rays used in hospitals are produced.)

Answer 2

Answer:

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The number of electrons in turn is equal to the number of protons in the nucleus.