-
-
Theorized some properties of atoms. He also theorized that atoms were specific to the material they composed. Source: American Board -
Their studies of the scientific process and natural processes allowed us to later discover the atom. Source: Health Research Funding -
Came up with a theory that stated that ideal geometric shapes form atoms. Source: Sutori -
Demonstrated that matter is made of tiny particles. He called them corpuscles. Source: Study.com -
Defined elements as chemicals that could not be broken down. Source: Study.com -
A model by John Dalton that showed the atom as a ball like structure. Source: Brilliant -
Published a theory on atomic theory. He suggested that all matter is made of atoms with distinct properties (elements). Source: Royal Society -
Stated that equal volumes of gases at the same temperature contained the same number of molecules. He also stated that elementary gases are composed of two atoms. Source: Le Monye College -
Devised the periodic table. Source: Britannica -
Came up with an experiment that proved the existence of electrons. Source: Khan Academy -
Discovered and coined the term radioactivity by discovering radium and polodium. Source: Britannica -
A model by J.J. Thomson that had electrons embedded in a positively-charged soup. Source: Khan Academy -
Mathematically predicted the size of atoms and proved their existence. Source: Ck12 -
Discovered the charge of electrons. Source: Nobel Prize -
Established that the mass of an atom is concentrated in its nucleus. Source: Primary Connections -
Proposed a theory on the hydrogen atom and another on radiation. Source: Nobel Prize -
Arranged the elements of the periodic table by atomic number and proved that the atomic number is the number of positive charges in the atomic nucleus. Source: Britannica -
A model by Neils Borh that showed that electrons orbit the nucleus. Source: American Board -
A model used to estimate the location of electrons. It was developed by Erwin Schrödinger and Werner Heisenberg. Source: Study.com -
Discovered the neutron. Source: Study.com