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What
He thought that all matter consisted of extremly small particles that cannot be divided.
How
He thought his ideas out with Aristotle in 500 BC -
What
He had the idea of a structure of matter
How
He thought his ideas out with Democritus in 500BC. -
What
Proposed a mechanical universe with small solid masses in motion -
What
All matter consisted of extremely small particels that cannot be divided
How
Dalton measured the mass of elements that combine when compounds form -
What
Arranged elements into 7 groups with similar properties. He discovered that the properties of elements "were periodic functions of the their atomic weights". This became known as the Periodic Law -
What:
Thomsond thought that things with opposite attractions attrack each other.
How:
his experiment had one disk a each end of a tube. Wires connected each disk to a source of electric currents. When the current is turned on, one disk becomes negative charged ,and the other becomes positively charged. Aglowing space appears between the disk. -
What
He believed that uranium enits have fast- moving particels that have a positive charge.
How
He had an atom with an evenly spaced mass with positive charges. -
What:
He suggested that an atom has a central nucleus.
How
He had an image that electrons move in orbit like the rings around Satur -
What:
He developed mathmatics equations to describe the motion of electrons in atoms.
His work lead to the electrron cloud model. -
What
He confirms the existences of neutrons, which have no charge.
How
Atomic nuclie contained neutrons and psitively charged protons. -
What:
Louis proposed that moving particels like electrons have some properties of waves. -
What
He thought that his idea and Rutherfords were the same, but his had a nuclrus surrounded by a large volume of space.
How
Bohrs modle focoused on the electrons movement with constant speed with a fixed odit around the nucleus.
