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Chapter 6

Atomic Structure and Chemical Bonds

TermDefinition
Electron Cloud Area where negatively charged electrons, arranged in energy levels, travel around an atom’s nucleus.
Energy level Different positions for an electron in an atom.
Electron dot diagram Chemical symbol for an element, surrounded by as many dots as there are electrons in its outer energy level.
Chemical bond Force that holds two atoms together.
Ion Atom that is positively or negatively charged because it has gained or lost electrons
Ionic bond Attraction that holds oppositely charged ions close together.
Compound A substance produced when elements combine and whose properties are different from each of the elements in it.
Metallic bond Bond formed when metal atoms share their pooled electrons.
Covalent bond Chemical bond formed when atoms share electrons
Molecule Neutral particle formed when atoms share electrons.
Polar bond Bond resulting from the unequal sharing of electrons.
Chemical formula Combination of chemical symbols and numbers that indicates which elements and how many atoms of each element are present in a molecule.
Proton Positively charge particle located in the nucleus of an atom and that is counted to identify the atomic number.
Electron Invisible, negatively charge particle located in a cloud-like formation that surrounds the nucleus of an atom
Nucleus Positively charged center of atom
Positive ion A charged atom that has lost one or more electrons
Negative ion A charged atom that has gained one or more electrons
Symbol Represents an element
Formula Combination of symbols
Subscript Represents number of atoms
Valence Electrons The electrons in the outermost shell of an atom.
Created by: erunge