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Chapter 7 Chemistry
Chemistry of matter and change notes. Tenth Grade.
Terms in this set (26)
What is a Chemical bond?
The force that holds atoms or ions together in a compound.
What is bond energy?
The measure of strength of the chemical bond.
what is an ionic bond?
The attraction between ions.
When does a Cation form?
When an atom loses one or more valence electron.
What is a Cation?
Why do atoms lose/gain valence electrons?
Acquire the stable electron structure of the noble gasses.
What is an anion?
when does an anion form?
when an atom gains one or more electrons
The tendency of an atom to gain, lose or share electrons to acquire a full set of 8 valence electrons is what?
Binary ionic compounds
contain one non metal and one metal.
Binary molecular compound
contain two nonmetallic elements.
ionic compounds do what when dissolved or melted?
conduct electricity and separate.
molecular compounds will do what when dissolved or melted?
won't conduct electricity.
group of atoms held together by a covalant bond.
Describe a metallic bond.
mettalic cation is attracted to delocalized
Briefly explain why metallic alloys are made.
Alloys have slightly different properties than
the pure metal they are mixed from.
Some alloys have increased strength and are
harder than the pure metal.
When a force is applied to a metallic solid, which ions and electrons move?
metal ions move as well as the delocalized
has metal atoms similar in size
atoms of one element are much smaller than the elements of the other
What is an alloy?
Mixture of metals
Which metallic property is best explained by the "sea of electrons" model of metals?
What does the electron sea model propose?
all metal atoms in a metallic solid contribute their valence electrons to form a "sea" of electrons.
what does the sea of electrons surround?
the metal cations in the lattice.
are free to move easily from one atom to the next, aren't held by any particular atom
electron sea model explains what?
physical properties of metallic solids
ion formed from only one atom
THIS SET IS OFTEN IN FOLDERS WITH...
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Chapter 3- Chemistry
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