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100
when is an atom stable
when it has 8 valence electrons - full outer shell
100
what is an ion?
an element that has gained or lost valence electrons
100
What does an ionic bond hold together?
a metal and a nonmetal
100
what is a molecule
two nonmetals attached together
100
what are most polyatomic ions?
nonmetals and negatively charged
200
What do the properties of an element depend on?
What is valence electrons?
200
What makes an element positive?
When it has lost electrons
200
What does a covalent bond hold together?
2 nonmetals
200
What is the formula for Carbon Monoxide?
CO
200
what do metals often form?
What is an ionic bond or a metallic bond
300
What does a dot represent on an electron dot diagram?
What is valence electrons?
300
What are anions?
nonmetals that have a charge
300
what is a single bond
to ions that have bonded one time
300
what is a binary compound
a compound with 2 ions
300
What is different about a metallic bond?
the electrons flow or form a sea of electrons
400
When do elements tend to react?
When they have less than 8 valence electrons - outer shell not full
400
What are cations
metal ions
400
what is a double bond?
two ions that have bonded twice
400
what do you use when metal has more than one possible charge to name the compound
a roman numeral
400
What is the formula for Copper (II) oxide?
CuO
500
When does the number of protons no longer equal the number of electrons
when valence electrons have been gained or lost
500
what is a chemical bond
a bond between a nonmetal (anion) and a metal (cation)
500
what is a triple bond?
two ions that have bonded together three times
500
what is a polyatomic ion
two or more nonmetals bonded together but still have a charge
500
What is the name of KCl?
potassium chloride