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Electrons are knocked off atoms, causing electricity to flow.
63 elements had been discovered so far.
JJ Thomson discovered electrons, which showed that atoms are not indivisible.
an anthill
He discovered that the atom contained smaller particles called electrons.
That most of an atom's mass was packed in a central nucleus
in bohr's model, the atom's mass is found at its center instead of distributed throughout
An early theory describing properties of atoms
7B
In Bohr's model , the atoms mass is found at its center instead of distributed throughout.
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The law of conservation of energy
When you shine a certain level of light wavelength on metal, you can knock electrons off the atoms of the metal. This phenomenon was explained by Albert Einstein in 1905, for which he received a Nobel Prize in 1921.
It has a positive (+) charge.
The nucleolus.
