![1.9: Understand that atoms consist of a central nucleus, composed of protons and neutrons, surrounded by electrons, orbiting in shells – Matt's Notes 1.9: Understand that atoms consist of a central nucleus, composed of protons and neutrons, surrounded by electrons, orbiting in shells – Matt's Notes](https://mattsgcsenotes.files.wordpress.com/2016/12/figure-02-01-01.jpeg?w=640)
1.9: Understand that atoms consist of a central nucleus, composed of protons and neutrons, surrounded by electrons, orbiting in shells – Matt's Notes
![What is an atom? - It's a Question of Physics - The Atomic Age - Linda Hall Library - Kansas City, MO What is an atom? - It's a Question of Physics - The Atomic Age - Linda Hall Library - Kansas City, MO](https://atomic.lindahall.org/siteart/questions/schrodinger-atom-for-carbon_lg.jpg)
What is an atom? - It's a Question of Physics - The Atomic Age - Linda Hall Library - Kansas City, MO
![What is an atom? - It's a Question of Physics - The Atomic Age - Linda Hall Library - Kansas City, MO What is an atom? - It's a Question of Physics - The Atomic Age - Linda Hall Library - Kansas City, MO](https://atomic.lindahall.org/siteart/questions/rutherford-atom-for-carbon_lg.jpg)