Chemistry Chapter 7 (ionic bonding and valence electrons)
CN for FCP
12
CN for HCP
12
noble gases have ________
2s and 6p e-
CN for NaCl
6
CN for BCC
8
metal cations
BCC, FCP, HCP
which type of packing is the least dense? which two are denser
BCC= least HCP and FCP =denser
other than white if cation is in the __ block
D
T or F? alloys arent as strong has pure metals
FALSE, they are stronger
mixture of 2 elements, one of which is a metal
alloys
8 valence electrons = ____________
already stable
what crystal is bigger: anion or cation?
anion
why can ionic compounds conduct electricity if they are dissolved or melted
bc the atoms can move more freely and conduct a current
why are ionic compounds not malleable
because if you move the ions around they repel each other
what does malleable and ductile mean
bendable and able to be formed into a wire
what does a roman numeral represent
charge of ion
valence electrons are the electrons responsible for the ____________ properties of atoms; and found in the ________ energy level
chemical, outer
how many ions of the pos charge are attached
coordination number
number of ions of opposite charge touching a given ion
coordination number (CN)
electrons in the energy levels below the valence electrons
core electrons
a way of showing and keeping track of valence electrons
electron dot diagram
nonmetal atoms _______ electrons and make ________
gain, anions (neg)
which noble gas doesn't have 8 e- in the outer level
helium, it has two
when one atom is smaller than the other (ex: stainless steel)
interstitial alloy
metals ______ electrons and they make ________
lose, cations (pos)
nonmetals have ______ valence electrons
many
only contains metal cations, the attractions of free-floating valence electrons for pos charged metal ions
metallic bond
are ionic compounds malleable or ductile
no
all atoms react and try to achieve a _________
noble gas configuration
white color if cation is in group ____ or ____
one or two
anions and cations are held together by ______________
opp charges
if a ion is in the D block use a _____ in their name
roman numeral
valence electrons are the electrons found in the _____ and _____ levels
s and p
study # of valence electrons on the periodic table!!!
see notes
how do you write Na+1
sodium ion
properties of ionic compounds
solids, very high melting point, arranged in crystals, conductors when dissolved in water or are melted, brittle
both atoms are roughly the same size
substitutional alloy
how do you write S 2-
sulfide (add ide)
what does the symbol of a dot diagram represent
the nucleus and the inner electrons (element)
in forming compounds, atoms tend to achieve a noble gas configuration; 8 in the outer level is stable
the octet rule
which two elements can have two diff charges? what are they?
tin and lead charges +4 or +12
true or false? core electrons don't react because they are too close to the nucleus
true
true or false? ionic compounds don't conduct electricity (endless it is dissolved or melted)
true
when writing a dot diagram FIRST _______ and THEN __________
write the symbol and then put one dot for each valence electron
charge of silver
+1
charge of zinc
+2