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AAMI INTRO TO CHEMISTRY UNITS1-4 (MIDTERM) EXAM QUESTIONS WITH COMPLETE SOLUTIONS
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AAMI INTRO TO CHEMISTRY UNITS1-4 (MIDTERM) EXAM QUESTIONS WITH COMPLETE SOLUTIONS
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AAMI INTRO TO CHEMISTRY UNITS1-4(MIDTERM) EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
Molecules - Answer-smallest electrically neutral particle of any substance that can
maintain a stable existence.
Monatomic molecules - Answer-one atom in its molecule.
Monatomic molecules - Answer-most elements are...
Monatomic molecules - Answer-Molecules and atoms are the same in this instance.
Diatomic molecules - Answer-exist naturally as 2 atoms bonded together.
covalent bonds - Answer-The bonds that hold diatomic molecules together.
Diatomic molecules - Answer-These molecules are held together by covalent bonds.
The Halogens (Cl2, Br2, F2, I2) as well as H2, N2 and O2. - Answer-Which elements
are diatomic molecules?
2
they are 2 atoms covalently bonded together - Answer-Whenever the halogens and H,
N, and O are written they will have a subscript of?
Because?
Polyatomic molecules (polyatomic ions / radicals) - Answer-are a group of atoms that
are bonded and possess a charge.
Polyatomic molecules (polyatomic ions / radicals) - Answer-molecules with more than 2
atoms.
molecular coefficient - Answer-The number written to the left of the symbol or formula
and applies to the element or entire compound that it is written next to.
molecular coefficient - Answer-is distributed throughout the compound.
molecular coefficient - Answer-Tells the number of molecules in the compound, or the
single elements that are present.
multiply the coefficient and subscript together - Answer-How do we determine the total
number molecules in a compound when there is a subscript and molecular coefficient?
,Molecular weight - Answer-is the sum of all atomic masses that makeup the compound.
that the number is next to. - Answer-When finding the molecular weight of a polyatomic
ion, the subscripts that are inside the parenthesis only apply to the symbol...
85 - Answer-What is the molecular weight for Na(NO3)?
atomic mass: Na=23, N=14, O=16
Periodic table - Answer-A table that shows the elements arranged in order of increasing
atomic number.
Periods - Answer-Horizontal rows of the periodic table
Groups/families - Answer-Vertical columns of the periodic table.
1 - Answer-All of group 1 (Li, Na, K, Rb, Cs, Fr) elements have how many valence
electrons?
noble gases and all of the halogens - Answer-In the last column is the... because they
have similar properties.
left
right - Answer-bold like step line dividing the table, metals to the .... and nonmetals to
the....
metals - Answer-electrons donors; lose electrons to become positively charged ions.
non metals - Answer-electron receivers; gain electrons to form negatively charged ions.
metalloids - Answer-divide metals fron non metals.
metalloids - Answer-located along the step line that divides the periodic table.
B, S, Ge, As, Sb, Te - Answer-Some examples of metalloids include...
metalloids - Answer-contain intermediate properties of metals and nonmetals. Some
properties are metallic and nonmetallic.
Halogens (Cl2, Br2, F2, I2) - Answer-Non metals examples
halogens - Answer-known as salt formers because they combine with many metals to
form a great number of salts.
-1 - Answer-Valence of the Halogens?
, Noble gases (Ar, He, Ne) - Answer-these elements are located in the extreme right
hand column.
0 - Answer-valence of noble gases?
stable - Answer-the noble gases have no valence because they are ...
noble gases - Answer-outer most shell of these elements are already full. The octet is
complete and do not need to gain or lose electrons.
compound - Answer-combination of 2 or more elements chemically combined in
DEFINITE PROPORTIONS by weight.
1)know the symbol
2)know the valence
3) criss cross the valences and drop the "+" and "-" the valences now become the
subscript for the opposite element - Answer-Specific rules that need to be strictly
followed when forming compounds. (3)
subscripts for the opposite element. - Answer-when forming compounds we criss cross
the valences and drop the "+" and "-" the valances now become the....
do not drop them down, they cancel each other out. - Answer-When forming
compounds and the elements have the same number...
more than one possible valence number - Answer-Some elements, particularly the
transition metals have...
+2 valence; ferrous - Answer-When forming compounds, if there is no subscript for Fe,
then we know that we have a Fe with a
radical combinations - Answer-act the same way as element combinations. What is
inside the parenthesis stays inside the parenthesis and what is outside stays outside.
Binary ionic compounds - Answer-compounds made up of 2 elements joined with an
ionic bond.
metal and non metal - Answer-in order for an ionic bond to form there has to be a
combination of a ...
name of 1st element
2nd element with -ide - Answer-how do we write out the name of a binary ionic
compound?
metal - Answer-In binary ionic compounds, the 1st name is always the ....
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