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They believed all metals are composed of mercury and sulfur and that it is possible to change base metals into gold. -
He theorized that all material bodies are made up of indivisibly small atoms. He introduced the idea of the atom as the basic building block of matter -
He found that there are 5 solid shapes whose sides are made from regular polygons and was convinced that atoms of matter acquire from from these 5 fundamental solids. -
Believed that chemical experiments could demonstrate the truth of corpuscularian philosophy. He created the idea of a element -
He found that the total mass of products and reactants in a chemical reaction is always the same. Total mass=reactants in chemical reactions -
He believed all matter was composed of atoms indivisible and indestructible building blocks. Also believed all compounds were composed of combinations of these atoms in defined ratios -
This model was created by John Dalton and stated that elements consisted of tiny particles called atoms. Also stated that all the atoms that make up the element have the same mass. -
He hypothesized that equal volumes of gas contain equal number of molecules and also hypothesized that elementary gases like oxygen, hydrogen, or nitrogen were composed of 2 atoms. -
He devised the periodic classification of the chemical elements and invented the periodic table. -
He determined the existence of a electron and figured out that the particles that make up the rays were 1,000 times lighter than the lightest atom. -
They discovered the radioactive elements polonium and radium. -
The model was proposed by JJ Thomson. The model explained 2 properties of atoms that are known: that electrons are negatively charged particles and that atoms have no net electric charge. -
He mathematically proved the existence of atoms and said that any liquid is made up of molecules. -
He discovered that there are 2 types of radiation, alpha and beta particles. Also figured out that atoms consist mostly of empty space with its mass concentrated on the nucleus. -
This model is created by Ernest Rutherford and describes an atom as a central massive positive entity and orbiting around it, the negative entities. -
First one to say there was electrons outside the nucleus. Also the first to discover that electrons travel in separate orbits. -
He discovered that there is a fundamental electric charge which is the charge of an electron. He figured out what the accurate determination of a charge carried by a electron. -
He discovered that the atomic number is the number of positive charges in the nucleus. -
He discovered the uncertainty principle which states that a particles position and momentum cannot both be known exactly -
He used mathematical equations to describe the likelihood of finding a electron in a specific position and he created the quantum mechanical model. -
A model of an atom in which the atom consists of a small but also giant nucleus surrounded by a cloud of rapidly moving electrons. This model was created by Erwin Schrodinger -
He discovered the neutron.