Furthermore, the electromagnetic fields accompanied by these charges can interact with radiation with wavelengths all across the electromagnetic spectrum, giving rise to the huge variety of spectroscopic techniques we have developed to help give us clues as to the structure of atoms and molecules.
What about the other forces in chemistry? What about the strong nuclear force? What holds the nucleus together? The strong nuclear force. At extremely short range, it is stronger than electrostatic repulsion, and allows protons to stick together in a nucleus even though their charges repel each other.
Remember that the size of the nucleus is really small compared to the size of an atom. When it comes to the strong force, there is a break-even point. Physicists have observed that the nucleus becomes increasingly more stable upon the addition of nucleons up to iron Then, as successive protons are added, the nucleus gets more and more unstable , due to the electrostatic repulsion outweighing the attractive nuclear force.
Once you get up to really high atomic numbers, the nucleus becomes unstable and can fragment into smaller, more stable components. At a range of 1 femtometer to 3 femtometers, the strong force binds nucleons protons and neutrons together to form the atomic nucleus. At a distance of about 0. Electrons bear a negative electrical charge, so they are attracted to the protons in the atomic nucleus.
Glue…complicated has to do with molecules mixing together; magnets…what do we know about them…positive, negative, opposites attract; earth and moon…gravity Try to get to magnetism and gravity. In the middle are the positive Protons and they like to stick to each other and the Neutrons.
Can anyone spot the puzzle? Look at the diagram. Does it make sense that the electrons would like to stay around the protons? That is the puzzle. Scientists call the forces that keep those guys together the strong and weak forces. Draw in the electrons so that they are under the Electromagnetic section of the board -- since they are attracted electromagnetically to the Protons and Neutrons.
It is only the nucleus that is held together by strong and weak forces. During the next several weeks, we will be talking about what electrons do and so it would be helpful if everyone could remember the parts of the atom.
Lets try to make some models of an atom. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Updated November 06,
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