Electron Theory
Description
The Bohr model of the atom was introduced in 1913. It is an early representation of the atom often introduced in chemistry to describe energies associated with electrons based on their location to the nucleus in the atom. While newer models of the atom are more accurate, the Bohr model was instrumental in understanding how elements are placed on the periodic table, and the properties that an element has based its number of valence shell electrons. The distribution of electrons in the orbital rings around an atom’s nucleus can help determine an element’s electrical properties. The stability of the electrons in the atom’s outer-most ring are one factor that helps determine whether an element will act as a conductor, an insulator, or a semiconductor. It is also important to look at the physical properties of the element when trying to determine which might be a better choice as a conductor, insulator, or semiconductor (state at room temperature, melting point, oxidation-reactivity with other metals). Cost and availability should also be considered. Combinations of elements can create new materials with desired properties that an element alone might not have.
Conclusion Questions
1. The three basic parts of an atom consist of electrons, neutrons, and protons.
2. The primary characteristic that makes an element a good conductor is that there is little electrons on its outer shell.
3. Three elements that are examples of good conductors are copper, gold, and silver.
4. The primary characteristic that makes an element a good insulator is that their outer electrons are tightly bound.
5. Three elements that are examples of good insulators are paper, glass, and wood.
6. Solder is made from tin and lead. Its good to use in electronics because it conducts electricity well.
2. The primary characteristic that makes an element a good conductor is that there is little electrons on its outer shell.
3. Three elements that are examples of good conductors are copper, gold, and silver.
4. The primary characteristic that makes an element a good insulator is that their outer electrons are tightly bound.
5. Three elements that are examples of good insulators are paper, glass, and wood.
6. Solder is made from tin and lead. Its good to use in electronics because it conducts electricity well.