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Chemistry

Unit 2 Concept 1 Atomic Theory and Structure

QuestionAnswer
Differentiate between the plum model and the nuclear model. plum pudding model = a positive sphere with ramdomly placed electrons throught it. No empty space. Nuclear model = a tiny nucleus with electrons all round it. Lots of empty space
Differentiate between the Bohr model and the electron cloud model. Bohr = is a nucleus with rings of electrons round them. electron cloud = a nucleus electrons moving all round
Describe the forces that holds the atom together. Electromagnetic Force holds the nucleus and the electrons together. Strong nucleur force holds the nucleus together.
Atom The smallest unit of an element that still has the properties of that element
Proton positive particle in the nucleus. It holds the identity of the atom
Neutron neutral particle in the nucleus with protons. protons and neutrons make up the mass of the atom
Electron negative particle outside of the nucleus in the electron cloud
Valance electrons the outermost energy level (has the most energy)
Created by: Kamryn7
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