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Vocabulary- Kelsey

Chapter 2 section 1

QuestionAnswer
Atom the basic unit of matter.
Nucleus the center of the atom, where neutrons and protons are found.
Electron negativly charged particle, zero mass
Element a pure substancethat consists entierly of one type of atom.
isotopoes atoms of the sam element that differ in the number of neutrons(mass changes)
Mass number sum of protons and neutrons
Compund a substanced formed by the chemical combination of two or more elements.
Ionic bonds when atoms gain or losse electrons.
Covalent bonds when atoms share electrons
Ions positivly and negativly charged atoms
molecule smallest unit of most compounds
tyvan der Waals forces when molecules are so close together a slight attaction can develop between the oppositely charged regions of nearby molecules.
Created by: BeitmanK16
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