Parts on an atom
- 1. The parts of an Atom
- 2. The atom An Atom: The most basic unit of matter. An atom has a dense nucleus and a cloud of negatively charged electrons around it. If matter is what everything is made of, and matter is made of atoms… Then, everything is really made of atoms!
- 3. An Electron Electron: A subatomic particle with a negative electrical charge. An electron’s mass is so small that it is generally not even considered.
- 4. A Nucleus Nucleus: The dense center of an atom containing protons and neutrons. Nucleus
- 5. A Proton A Proton: A subatomic particle within the nucleus of an atom that has a positive charge.
- 6. Neutron A Neutron: A subatomic particle within the nucleus of an atom that has a neutral charge.
- 7. Energy Level The energy level of an atom is as follows: 2,8,8 The first shell has two electrons The second shell has 8 electrons The third shell has 8 electrons MEMORIZE: 2,8,8!!!!!!!!!!
- 8. Atomic Number The atomic number is the number mainly associated with the element and represents the number of protons present in the atom.
- 9. Mass Number The total number of protons and neutrons. The mass of an atom comes from the protons and neutrons. Therefore, the mass includes the masses of each added together. This number can be found Mass Number at the bottom, typically.
- 10. Atomic Mass Sub atomic particles are measured in AMU’s. AMU stands for Atomic Mass Unit. Every proton has a mass of 1 AMU Every Neutron has a mass of 1 AMU Remember, electrons don’t have a measureable mass.
- 11. Element A pure chemical substance consisting of ONE type of atom.