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Chapter 7 chem

TermDefinition
How can you determine the number of valence electrons in an atom of a representative element? The number of valence electrons is the same as the periodic group number
How do cations form when an atom loses one more electrons; the loss of electrons form an overall positive charge
How do anions form When one or more electrons are gained; typically pulled from another atom
What is a valence electron Electrons in the outermost energy level
How do valence electrons determine chemical properties Valence electrons are the one gained or lost or shared during a chemical reaction so this effects there chemical properties and they will be the first to react due to being on the outside.
Explain the octet rule Atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas
What are the exception to the octet rule the transition metals
Ionic compounds made up of ions and held together by ionic bonds
Ionic bonds charge neutral or equal to zero
Ionic Compound Properties crystalline solid a room temp, high melting point, coordination number (number of oppositely charged ions around an ion in a crystal), tend to be good electrical conductors when dissolved
What does the chemical formula of an ionic compound represent ratio
How do chemists model the valence electrons of metal atoms? As sea of electrons
Why alloys more useful than pure metals? Alloys have better corrosion resistance, lower costs, high strength and better work ability
Ductile Able to be drawn into wire
Malleable Hammered or pressed into sheets
Describe two ways that an ion form an atom Ions from when atoms gain or lose electrons for the outermost shell
Define an ionic bond The chemical bonding that involves the attraction between two opposite charged ions.
How can you represent the composition of an ionic compound The composition of an ionic compound is represented by a formula which is a ratio between cations and anions
Created by: salleejamie
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