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Gr 8 CH INTERACTIONS

Chapter 2 Atoms and Bonding

QuestionAnswer
atom a nucleus surrounded by one or more electrons
nucleus the tiny, central core of a atom that contains protons and neutrons
protons atomic particles with a positive charge
neutrons atomic particles with no charge
electrons atomic particles with a negative charge
valence electrons the electrons farthest from the nucleus; involved in bonding
electron dot diagram a symbol of an element surrounded by dots each representing one valence electron
atomic number the number of protons in an atom
group family; elements in the same vertical column in the periodic table
period the elements in the same row in the periodic table
ionic bond the attraction between two oppositely charged ions
ion an atom or group of atoms that become electrically charged by gaining or losing a valence electron
polyatomic ions ions that are made of more than one atom
crystal ions forming an orderly, three-dimensional arrangment
covalent bond a chemical bond formed when two atoms share electrons
double bond two pairs, or four electrons, are shared
molecular bonds molecules with covalently bonded atoms
polar a bond in which electrons are shared unequally
nonpolar a bond in which electrons are shared equally
mineral a naturally occurring solid that has a crystal structure and a definite chemical composition
Created by: Dcoleman
 

 



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