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Atoms and Bonding
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A metal consists of positive metal ions in a "sea" of ___.
electrons
What is one advantage of using an alloy instead of a pure metal?
stronger, resists corrosion, not as bendable
When electrons are transferred between two atoms, a ___ bond is formed.
Ionic
When an atom gains an electron, it becomes ___.
Negative
The attraction between a positive metal ion and the electrons surrounding it is ___.
a metallic bond
Stainless steel and bronze are examples of ___.
an alloy
Give a reason for why water and oil don't mix.
Water is polar and oil is nonpolar
How does a covalent bond hold two atoms together?
The nucleus of the atom is positive and the electrons of the other atom is negative, they attract to each other
Which of these is a property of ionic compounds?
 
brittle
 
low boiling point
 
low melting point
 
cannot conduct electricity
What is the chemical name for the compound Na2S?
Sodium sulfide
How many electrons make an atom "happy"?
8
A covalent bond in which electrons are shared unequally is ___.
a polar bond
The electrons involved in bonding are ___ electrons.
valence
In the chemical formula for hydrogen peroxide (H2O2) what do the 2's mean?
There are 2 hydrogen atoms and 2 oxygen atoms in it
How do we draw a bond between two atoms?
two dots (electrons) or a dash line
Give one property of an ionic compound.
crystal structure, conducts heat and electricity, high boiling point
When an atom loses an electron, it becomes ___.
an ion


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