Chemistry is the study of atoms. Chemical scientists study what atoms are made of and how they connect. Atoms are the building blocks of matter. Atoms are made up of protons, neutrons and electrons.
It was John Dalton who put forward his ideas and theories about atoms at the beginning of the 19th century: Dalton proposed that atoms were like tiny, hard balls (Absorb Learning, 2008). Then at the end of the 19th century JJ Thompson discovered the electron through an experiment. When JJ Thompson did some more experiments on these ‘electrons’ Thompson discovered that they were attracted to positively charged particles, so Thompson concluded that the electrons were negative (Absorb Learning, 2008). That is when Thompson came up with the Plum Pudding Atom model, as shown to the right. 8 years later, Ernest Rutherford and two …show more content…
In 1913, physist Niels Bohr explained for the first time ever how the atom released specific amounts of light each time: the electrons are orbiting around the large positive charge fast. Niels bohr said that electrons could only occupy specific energy levels as they orbit the nucleus, so he came up with the diagram called bohr (Absorb Learning, 2008); bohr diagrams. The following years, many scientists put an experiment together that would fire particles at the nucleus. Every so often a positively charged particle was knocked out, called a proton. The other particle was never disrupted, so scientists said it had no charge which they called a neutron. From Dalton, to Thompson, to Rutherford, and every other scientist who contributed to the background of the atom has defined what it really is and what is looks like. Inside the atom you would find protons, neutrons and electrons. The protons and neutrons are found in the nucleus, and the electrons are
It was John Dalton who put forward his ideas and theories about atoms at the beginning of the 19th century: Dalton proposed that atoms were like tiny, hard balls (Absorb Learning, 2008). Then at the end of the 19th century JJ Thompson discovered the electron through an experiment. When JJ Thompson did some more experiments on these ‘electrons’ Thompson discovered that they were attracted to positively charged particles, so Thompson concluded that the electrons were negative (Absorb Learning, 2008). That is when Thompson came up with the Plum Pudding Atom model, as shown to the right. 8 years later, Ernest Rutherford and two …show more content…
In 1913, physist Niels Bohr explained for the first time ever how the atom released specific amounts of light each time: the electrons are orbiting around the large positive charge fast. Niels bohr said that electrons could only occupy specific energy levels as they orbit the nucleus, so he came up with the diagram called bohr (Absorb Learning, 2008); bohr diagrams. The following years, many scientists put an experiment together that would fire particles at the nucleus. Every so often a positively charged particle was knocked out, called a proton. The other particle was never disrupted, so scientists said it had no charge which they called a neutron. From Dalton, to Thompson, to Rutherford, and every other scientist who contributed to the background of the atom has defined what it really is and what is looks like. Inside the atom you would find protons, neutrons and electrons. The protons and neutrons are found in the nucleus, and the electrons are