Atom & Electron
The Structure of Matter: Section in Physics Online Classroom
Objectives
If you can explain why, if atoms are mostly empty space, why does everything look so solid?
Electrons, because of their wave nature, form a kind of cloud as they cruise throughout the atom. Compressing this electron cloud takes great energy and means that when two atoms come close together, they repel each other. if it were not for this repulsive force between atoms, solid matter would be much more dense than it is. The forces of repulsion keep atoms from caving in on one another.
A single vibrating electron emits an electromagnetic wave that is polarized. So a vertically vibrating electron emits light that is vertically polarized, while a horizontally vibrating electron emits light that is horizontally polarized. Explain what polarization is?
How does an electron relate to electricity?
(electrons that orbit the atomic nucleus are the same kind of electrons that flow in the wires of electric circuits)
a high energy electron beam has a wavelength more than a thousand times smaller than the wavelength of visible light. Atomic detail can be seen with this beam and are involved with scanning electron microscopes
What is an ion?
The Structure of Matter: Section in Physics Online Classroom
Objectives
- Describe atoms and electrons
- Compare the ages of atoms to the ages of the materials they compose
- give examples that illustrate the small size of atoms
- state evidence for the existence of atoms
- relate atom to electricity and electromagnetism
- describe examples that illustrate that the atom is mostly empty space
- describe the solid, liquid, gaseous and plasma states of matter
If you can explain why, if atoms are mostly empty space, why does everything look so solid?
Electrons, because of their wave nature, form a kind of cloud as they cruise throughout the atom. Compressing this electron cloud takes great energy and means that when two atoms come close together, they repel each other. if it were not for this repulsive force between atoms, solid matter would be much more dense than it is. The forces of repulsion keep atoms from caving in on one another.
A single vibrating electron emits an electromagnetic wave that is polarized. So a vertically vibrating electron emits light that is vertically polarized, while a horizontally vibrating electron emits light that is horizontally polarized. Explain what polarization is?
How does an electron relate to electricity?
(electrons that orbit the atomic nucleus are the same kind of electrons that flow in the wires of electric circuits)
a high energy electron beam has a wavelength more than a thousand times smaller than the wavelength of visible light. Atomic detail can be seen with this beam and are involved with scanning electron microscopes
What is an ion?