Chemistry

an anthill

energy can neither be created nor we destroy

That energy can only be converted between different forms ~Apex

He discovered that the atom contained smaller particles called electrons.

That most of an atom's mass was packed in a central nucleus

Before Rutherford, scientists assumed that the atom was a single particle. Rutherford presented his revolutionary, physical atomic model that suggested an atom consists of a central charge (the term 'nucleus' was coined after Rutherford's model was presented) that is surrounded, presumably, by a cloud of orbiting electrons. He showed that most of an atom's mass was located in the atom's nucleus.

Rutherford's model was later improved upon by Niels Bohr, father of the Bohr-model. Rutherford made no connection to an element's atomic number and the number of protons within an atom's nucleus; however, his atomic model paved the way for the discovery of this correlation only a couple years after his model was designed.

in bohr's model, the atom's mass is found at its center instead of distributed throughout

Type your answer here... The hydrogen atoms in heavy water have a neutron in the nucleus, doubling the mass.

An early theory describing properties of atoms

Separating DNA

Most of the alpha particles shot at the gold foil went straight through the foil

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.

Na-23

That the atom Mostly consisted of empty space.- apex