19 terms

Chemistry ch. 15

valence electrons
electrons in the highest occupied energy level of an element's atom
chemical properties, chemical bonds
The valence electrons largely determine the ______________ of an element and are usually the only electrons used in _____________.
electron dot structure
diagram that shows the valence electrons as dots
metallic atoms tend to lose their valence electrons to produce a ______________.
most nonmetallic atoms achieve a complete octect by gaining or ____________ electrons.
Atoms of most nonmetallic elements achieve noble-gas electron configurations by gaining electrons to become __________, or negatively charged ions.
They have relatively full valence shells.
What property of nonmetallic elements makes them more likely to gain electrons than lose electrons?
ionic bond
electrostatic force of attraction that binds oppositely charged ions
cations, anions, neutral
In an ionic compound, the charges of the _________ and _________ must balance to produce an electrically __________ substance.
crystalline solids
most ionic compounds are _______________ at room temperature.
Is the following sentence true or false? ionic compounds generally have low melting points.
metallic bonds
the forces of attraction between
free-floating valence electrons and positively charged metal ions
electrical conductivity, ductility, malleability
Name three properties of metals that can be explained by metallic bonding
a mixture of two or more elements, at least one of which is a metal
Is the following sentence true or false? Pure metals are usually harder and more durable than alloys.
interstitial alloy
type of alloy that have smaller atoms that fit into the spaces between larger atoms
substitutional alloy
type of alloy that have component atoms that are rougly equal in size
dissolved in water
ionic compounds are good conductors of electricity when.......
Ionic compounds usually have high melting points, which explains why ionic compounds are usually found as ___________ at room temperature.