Writing Chemical Equations
Writing
Equations
Types of
Equations
Lab
Potpourri
$200
$200
$200
$200
$200
$400
$400
$400
$400
$400
$400
$600
$600
$600
$600
$600
$600
$800
$800
$800
$800
$800
$800
$1000
$1000
$1000
$1000
$1000
$1000
Balancing
Equations
Just
Memorize
$200
Final Jeopardy
Final Jeopardy
Combustion
Final Jeopardy
2C4H10 + 13 O2 -----> 8CO2 + 10 H2O
Write the complete balanced
equation for the combustion
of C4H10.
$200
The number you put in front of a compound
to balance an equation.
A coefficient
$400
To balance a compound so charges = zero
and
it equals the numbers of atoms in a
compound
Purpose of a subscript
$600
False
True or False:
The coefficients on one side
of the arrow will equal the
coefficients on the other side.
$800
When you have an odd number of oxygens
on the right side and an even on the left side
of the arrow.
Under what circumstances is
it easier to balance an
equation by making a ratio in
front of the Oxygen atom
$1000
_MgO2 should be MgO
Why won’t this equation balance:
_MgCO3(s) --->_MgO2 (s)+_CO2(g)
$200
CH4
Formula for Methane
$400
Increases due to the adding of more energy
levels
Trend of atomic size going
down a family…
$600
Trend of atomic size going across a period
What Decreases due to energy level
staying the same, while effective
nuclear charge increases (more pull
on valence electrons)?
$800
Ionization Energy
What is the energy needed
to move an electron?
$1000
The effective nuclear charge and atom size
What are factors which
affect ionization energy
and how they affect it ?
$200
Trend of ionization energy going down a
family
What decreases (easier to
remove) because size is
bigger, so valence electrons
are further away ?
$400
Trend of ionization energy going across a
period
What increases (harder to remove)
due to effective nuclear charge
increasing (more pull - more likely
to attract electrons) ?
$600
Electronegativity
What energy is needed to add
an electron (likeliness to
gain)?
$800
effective nuclear charge and atom size
What factors which affect
electronegativity and how
they affect it ?
$1000
Decreases.. if size is bigger, less pull from
nucleus
•What is the trend of
electronegativity going down
a family
$200
Combustion
What type of reaction is
usually inventoried for
balancing with CHO
$400
Ionic Size
Size of an ion
$600
to organize elements in meaningful way
Why was periodic table
developed?
$800
Mendeleev - increasing molar mass, while
today’s is increasing atomic number
How was Medeleevs scheme
for listing elements different
from that used in the modern
periodic table?
$1000
elements in same group have same number
of valence electrons
What relationship can be seen
between an elements
placement within a group and
its electron configuration?
$200
Noble gases had not been discovered yet
due to their inactivity
Why did Group 8 not appear
on the Mendeleev periodic
table?
$400
increasing tendency to form neg ions
therefore use less energy (minus -:
Exothermic
Trend of electron affinity
across left to right
$600
farther from nucleus therefore uses less
energy to add an electron also shielding can
add electrons
Trend of electron affinity
down top to bottom
$800
X + e− → X−
Equation electron affinity
$1000
M(g) + hn ® M+ + e-.
Equation for ionization
energy
$200
both negative ions (right side) give off
energy to gain an electron + ions use energy
Electron affinity energy can
be what: + or -?
$400
1) shielding 2) Effective (Strong) nuclear
charge 3) add another orbit of electrons
increases distance from nucleus
Name 3 concepts that can
affect periodicity
$600
Protons and neutrons in element 114
What exactly do these two
pictures represent and where
are the from?
$800
Dalton, Thompson, Rutherford and
Bohr…Schrödinger, and Heisenberg,
st
1
Name the five scientists in
“The Atom Song”
$1000
1s2 2s2 2p6 3s2 3p2 and [Ne] 3s2 3p2
Long and short electron
configuration for silicon.
Daily
Double
You could not replace any other metal
When we talked about the
“REACTIVITY SERIES” If
you were a metal at the
bottom of the list, what would
this mean?
The Jeopardy champion!