Atom Model
Posted by Professor Cram in Atoms and Molecules
Atom Model
An atom is the smallest particle of an element that contains the chemical properties of that element. Learn about atoms and their components (protons, neutrons, and electrons) in this program.
The Atom
The atom is the smallest particle of an element that contains the chemical properties of that element.
The three primary subatomic components of an atom are the proton and neutron (contained in the nucleus), and the electron (orbiting the nucleus at energy levels called shells).
Protons
A proton is a subatomic particle of the nucleus of an atom. Protons have a positive unit charge of one and an atomic mass on one.
The number of protons in the nucleus determines the atomic number and establishes the number of electrons needed to produce an electrically-neutral atom.
Neutrons
A neutron is a subatomic particle of the nucleus of an atom. Neutrons have a neutral unit charge and an atomic mass of one.
Electrons
An electron is a subatomic particle that orbits around the nucleus of an atom in energy levels called shells.
The electron has a negative unit charge and almost no atomic mass.
An atom's chemical properties are established by the distribution and number of electrons in their energy shells.
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Click one of these links to get more help from another Cramlet in this same chapter:
- Chemical Formula Quiz: Organic Compounds
- Chemical Formula Quiz: Inorganic Compounds
- My Chemistry Flashcards
- My Chemical Formula Flashcards
- Quantum Numbers
- Atom Model
- Chemical Symbol Lookup Table
- Chemical Symbol Quiz
- Electron Orbitals
- My Chemical Elements Flashcards
- Periodic Table
- Using The Periodic Table





The atom model can move and it attracts the attention of students. The discription is clear and the atom model moves according to specific item, so the students can easily understand.
it is very good learning website
how we make a atom modal for present in front of student .
This is a very good way of learning
students can understand very well
JKS!! its good
ahmm so very good its so goodso many get learn
very good explanation with visual atom model, i used this to explain atoms to my students.
This is great! I was amazed at the animated model! My teacher would love this, so keep up the great work!
it awsome