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More Lessons: http://www.MathAndScience.comTwitter: https://twitter.com/JasonGibsonMath In this lesson, you will learn about the atomic theory of matter as ...
- 44 min
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- Math and Science
- Thomson Plum Pudding Model
- Rutherford Planetary Model
- Bohr Model
- Electron Cloud Model
At the start of the 20th century, J.J. Thomson did experiments to learn about the atom. He showed that positively-charged and negatively-charged particles made up atoms. What he was not sure about was how they fit together. His idea at the time was that the negative electrons were stuck into a positive sphere. He imagined that the atom looked like ...
Scientists’ understanding of the atom changed in 1911. This was due to the gold foil experiment done by Ernest Rutherford and his team. In their work, they saw that the positive charge of atoms seemed to be concentrated at their centres. Rutherford called this the nucleus. He also predicted that the electrons would orbit the nucleus, like planets a...
Rutherford’s planetary model explained a lot. But it didn’t answer some questions that scientists still had. They wondered where the electrons actually were. Could their location be predicted? They also wondered why the orbiting electrons didn’t lose energy and crash into the nucleus. Luckily, Danish scientist Niels Bohrwas trying to find those ans...
The Bohr Model quickly became popular. We still use it today because it helps us understand how and why atoms interact with each other. But scientists were not finished trying to understand how atoms look. In 1926, Austrian physicist Erwin Schrödinger took Bohr’s model a step further. He proposed a model which described the likelihood of finding an...
In this interactive activity from ChemThink, learn about atomic structure. Follow the tutorial to understand how individual atoms—the basis of all matter—are composed of subatomic particles such as electrons, protons, and neutrons. Investigate the three types of particles, their properties (such as mass and charge), and relative locations.
When two or more atoms chemically bond with each other, the resultant chemical structure is a molecule. The familiar water molecule, H 2 O, consists of two hydrogen atoms and one oxygen atom. These bond together to form water, as Figure 2.8 illustrates. Figure 2.8 Two or more atoms may bond with each other to form a molecule. When two hydrogen ...
This interactive activity from ChemThink describes covalent bonding—a type of chemical bond that involves the sharing of electrons. Investigate the attractive and repulsive forces that act on atomic particles and how the sharing of electrons can keep atoms together. See how two hydrogen atoms interact with each other to create a covalent bond. Learn about trends in the periodic table and how ...
Aug 16, 2024 · The basic facts to know about the atom are that it is made up of three basic subatomic particles: 1) electrons (negative charge) that spin in shells around a nucleus that consists of 2) protons (positive charge) and 3) neutrons (neutral charge). Generally, the number of protons and electrons balance out to make the atom have an electrically neutral charge.
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Atoms can form strong bonds with each other, making molecules close molecule Two or more atoms which are strongly bonded together. The smallest particle of a substance that has all of the physical ...
