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Unit 7: ionic bond

This is a review over chapter 7: ionic and metallic bonding in Person Textbook

Question/TermAnswer/definition
Valence electrons The electrons in the highest occupied energy level of an element's atoms.
How do you find valence electrons? by looking at the elements group number
Electron dot structure Diagrams that show valence electrons in the atoms of an element as dots.
Octet rule in forming compounds, atoms tend to achieve the electron configuration of a noble gas
When is a cation produced? It is produced when an atom loses one or more valence electrons.
Group 1, 2 and 3 usally lose electrons and become cations
when is an anion produced? It is produced when an atom gains one or more valence electrons.
Halide ions the ions produced when atoms of chlorine and other halogens gain electrons
Ionic compound A compound composed of cations and anions, and is electrically neutral
ionic bonds The electrostatic forces that hold ions together in ionic compounds.
Chemical formula Shows the numbers of atoms of each element in the smallest representative unit of a substance
Formula unit the lowest whole-number ratio of ions in an ionic compound
most ionic compounds are ________ at room temperature and have high melting points crystalline solids
Coordination number number of ions of oppisite charge that surround the ion in a crystal
Ionic compounds can ___ ___ ___ when melted or desolved in water conduct electric current
Metallic bonds the forces of attraction between the free-floating valence electrons and the positively charged metal ions.
Body-centered cubic Every atom has eight neighbors and the metallic elements sodium, potassium, iron, chromium, and tungsten crystallize i a body-centered cubic pattern.
Face-centered cubic Every atom has 12 neighbors and the metallic elements are copper, silver, gold, aluminum, and lead.
Hexagonal close-pack Every atom has 12 neighbors and metals are magnesium, zinc, and cadmium
Alloys mixtures of two or more elements, at least one of which is a metal
Created by: hihello2007
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