Transcript subjectively

Ch 1
The Science of
Chemistry
Ch 2
Matter and
Energy
Ch 3 part I
Atoms and
Moles
Ch 3 part II
Atoms and
Moles
Ch 4
The Periodic
Table
Ch 5
Ionic
Compounds
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In an exothermic
reaction, heat is
_____.
In an endothermic
reaction, heat is ____.
In an exothermic
reaction, heat is
released.
In an endothermic
reaction, heat is
absorbed.
How many sig figs?
a. 3004
b. 0.034
c. 430.0
d. 430
a. 3004- 4
b. 0.034- 2
c. 430.0- 4
d. 430- 2
The density of copper is
8.94g/mL. In the lab, a
student found the density
to be 7.99g.mL.
What is the percent error?
True – Exp x 100
True
(8.94g/mL – 7.99g/mL) x 100
8.94g/mL
=10.6%
C60 the buckyball
diamond
The following are examples of
________.
Allotropes of an element.
More than one of the same
element chemically
bonded.
Choose pure substance or
mixture for each statement:
1. Can be physically separated?
2. Is one type of atom or
molecule?
3. Has variable composition?
4. Has properties similar to it’s
individual components?
1.Can be physically separated? M
2. Is one type of atom or
molecule? PS
3. Has variable composition? M
4. Has properties similar to it’s
individual components? M
Give an 2 examples
of derived units
g/mL
3
cm
m/s
Fill in the unit or
quantity:
grams: _____
3
cm : _____
_____: density
grams: mass
3
cm : volume
g/mL: density
Orange and fuzzy is a
qua_ _ _ _ _ _ _ _
description.
Orange and fuzzy is a
qualitative description
( not quantitative).
Scientists are
supposed to write
subjectively. What
does that mean?
They should leave
out personal bias
or opinions.
Find the measurement of the two
graduated cylinders to the correct
number of decimal places.
30.0mL
4.27mL
Name the 7 families on
the periodic table in
order from left to right
& top to bottom.
alkali metals, alkali-earth,
transitions, halogens,
noble gases,
lanthanides, actinides
Match the scientist to his
discovery:
1) Bohr
a) electron
2) Thomson
b) nucleus
3) Rutherford c) orbits
1c Bohr/orbits
2a Thomson/e
3b Rutherford/nucleus
Calculate the mass of
one mole of Fe2O3 .
159.70g/mol
Match the scientist to his
experimentation of the atomic
theory.
1) Bohr
a) light
2) Thomson
b) Gold-foil
3) Rutherford c) Cathode Ray
Tube
1a Bohr/light
2c Thomson/Cathode Ray
3b Rutherford/Gold Foil
Explain Bohr’s
theory on how
light is emitted.
When an electron gains
energy it moves further
from the nucleus to a
higher energy level, it then
falls back down emitted
that energy as light.
The atom is made of
a very dense ______
and a very spacious
______ ____.
The atom is made of a very
dense nucleus and a very
spacious electron cloud.
Which element
serves as the
standard that the
amu was created
from.
The carbon-12
isotope.
How many moles
of carbon are in
330g C?
Show work on board.
27mol C
How many proton,
neutrons, and
electrons does the
+2
Ni ion have? It’s
mass number is 58.
+
p
28
30 n
26 e
Name 3
characteristics of
a making a good
graph.
1.Use the most available space so
it’s easier to read and estimate.
2. Label axes and units(if needed)
3. Good descriptive title
4. Equal increments on the axes
Atoms in the same
group have the same
________ _______.
Valence
electrons
If an unknown’s atoms
have low
electronegativity and
delocalized electrons, it
is held together by
________ bonds.
Metallic bonds
Ch 5 question:
Pick two specific
elements that would
fit into this formula:
X3 Y
Any cation from group 1.
Any anion from group 15.
+
-3
Example: Na 3P
On the periodic
table, where are the
most reactive metals
and the most
reactive nonmetals?
The alkali metals
and the halogens.
Match the vocab with the correct
trend.
1. Ionization energy
2. Atomic radius
3. Electron affinity
a. highest at top right
b. highest at bottom left
1a I.E.- top right
2b size- bottom left
3a E.A.- top right
Which family tends
to have a +2 charge?
Alkaline-Earth Metals
Which noble gas is
the sulfur ion
isoelectronic with?
Argon; sulfur gains
two electrons and
will have 18 e
If an unknown solid is
brittle, has a very high
melting point, strong
bonds, and localized
electrons, it is a ________.
(one or two words will
work)
salt;
ionic compound
Electroneutrality is
when there are equal
numbers of _____ and
______ charges
Electroneutrality is
when there are equal
numbers of positive
and negative charges
How many ions are
there in Sr3(PO4)2 ?
5
Three cations and
two anions
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