Term
Burning of paper
Physical or chemical change |
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Definition
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Term
Dissolving of sucrose
Physical or chemical; |
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Definition
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Term
Which substance is an organic molecule?
H2O
NaCl
CuSO4
C2H5OH |
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Definition
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Term
What state of matter is bromine at 65oC?
Melting Pt = -7oC
Boiling Pt = 59oC |
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Definition
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Term
What property of matter was the chromatography lab based on?
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Definition
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Term
| What type of mixture is salt water? |
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Definition
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Term
What type of mixture can be filtered?
Homogeneous or heterogeneous |
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Definition
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Term
| A substance that cannot be broken down by any physical or chemical means is ... |
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Definition
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Term
In the reaction;
2 H2 + O2 --> 2 H2O
How much water would form if 18 grams of H2 react with 144 grams of O2? |
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Definition
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Term
| What scientific law is used in the previous example? |
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Definition
| Law of Conservation of Mass |
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Term
| The fact that sodium explodes in water is an example of what type of property? |
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Definition
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Term
| Distillation is a process that separates a mixture of liquids based on what property? |
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Definition
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Term
Round off the numbers to 3 significant figures:
57.023
450.00896
5.78 x 105 |
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Definition
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Term
How many significant digits are in each of the numbers?
a)123.006
b)0.00120
c) 1.76 x 103 |
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Definition
a) 6 [123.006]
b) 3 [0.00120]
c) 3 [1.76 x 103] |
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Term
What is the answer to the correct number of significant digits?
12.011 + 2.5 |
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Definition
14.5
Because the 2.5 has only 1 decimal which determines the S.F. in an addition/subtraction problem |
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Term
What is the answer to the correct number of significant digits?
25.55 / 5.0 |
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Definition
5.1
because the 5.0 has only 2 S.F. which is the determining factor when multiplying or dividing |
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Term
| Convert 14.2 cm to kilometers |
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Definition
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Term
| How many nanometers in 6 mm? |
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Definition
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Term
A car travelling at 65 mph is travelling how many Km per min?
(1 mile = .6 Km) |
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Definition
1.73 km/min
65mph x 1.6 km/mi x 1 hr/60 mins
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Term
| What part of Dalton's atomic theory has been amended? |
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Definition
Atoms are now divisible.
AND
Atoms of the same element can have different atomic masses. |
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Term
| What subatomic particle is a cathode ray made of? |
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Definition
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Term
What particle did Rutherford aim at gold foil?
What does the particle consist of? |
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Definition
Alpha beam
2 protons and 2 neutrons
(a Helium nucleus) |
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Term
| How many protons, neutrons and electrons are in the element P - 32? |
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Definition
| 15 protons, 15 electrons, 17 neutrons |
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Term
| Write the symbol for an isotope of Si -14? |
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Definition
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Term
| According to the band of stability, what particles are in a 1:1 ratio, then a 1:1.25 ratio for atomic stability? |
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Definition
| 1 proton to 1 or 1.25 neutrons |
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Term
| What particle determines the identity of an element? |
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Definition
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Term
| What particle determines the chemical reactivity of an element? |
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Definition
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Term
| What are the sublevels in the 4th pricipal energy level? |
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Definition
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Term
| What is the maximum number of electrons in the "d" sublevel? |
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Definition
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Term
| What part of the Periodic Table has the "d" sublevel filling in? |
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Definition
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Term
| What is the electron configuration of Si? |
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Definition
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Term
Identify the element:
1s2 2s2 2p6 3s2 3p6 4s2 3d1 |
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Definition
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Term
What must be true of electrons in the same orbital?
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Definition
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Term
| What are the orbital orientation in the "p" sublevel? |
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Definition
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Term
| Why does hydrogen get placed with the alkali metals on the periodic table/ |
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Definition
| Because it has 1s1 as its electron configuration |
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Term
| What atomic property explains why the noble gases are inert? |
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Definition
The noble gases have a stable octet
s2p6 |
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Term
| What is the trend for Ionization energy across a period? |
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Definition
| Ionization energy increases across a period. |
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Term
| Explain the Ionization energy trend. |
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Definition
| Going across a period the nuclear charge increases while the electron shielding stays the same so it is harder to remove the electron. |
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Term
which has the larger atomic radius
Al or Cl? |
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Definition
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Term
Which has the larger Ionization Energy
Na or Rb |
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Definition
Na
Because it has less electron shielding |
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Term
How many electron shields are present in an atom of
Bromine? |
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Definition
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Term
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Definition
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Term
Write the formula for
dinitrogen pentaoxide.
Is it an ionic compound? |
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Definition
N2O5
No - because it is composed of 2 nonmetals. |
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Term
Name the compound
Mg CO3
What type of compound is it? |
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Definition
magnesium carbonate
an ionic compound |
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Term
What type of element is this
It has a shiny luster, is malleable and conducts electricity |
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Definition
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Term
This element has an incomplete "d" sublevel,
Where is it on the periodic table? |
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Definition
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Term
This element has the outer energy level
s2 p 6
What family is it? |
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Definition
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Term
| This element has 5 electrons in the outer 4th energy level? |
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Definition
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Term
| This is the only positive polyatomic ion |
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Definition
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Term
Is this electron configuration "excited"
1s2 2s2 2p6 3s2 3p6 4s2 4p1 |
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Definition
Yes - because the last electron should fill in
3d1 |
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Term
What is the frequency of a blue light with a wavelength of 450 nm?
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Definition
3 x 108 m/sec = wl x (450 x 10-9)
6.66 x 1014 Hz |
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Term
| Which type of electromagnetic radiation has the shortest wavelength? |
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Definition
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Term
| What part of the electromagnetic spectrum has the highest frequency? |
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Definition
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Term
| What part of the electromagnetic spectrum do we use for cooking? |
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Definition
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Term
What is amount of energy in light with a frequency of
4.5 x 1014 Hz? |
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Definition
E = h Freq
(Panck's constant)
(6.626 x 10-34 ) x (4.5 x 10 14)
2.98 x 10-19 joules |
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Term
| What is the difference between an extensive and intensive property? |
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Definition
| Extensive properties deal with the amount of a substance while intensive properties are specific to the material. |
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Term
| Give example of an intensive property. |
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Definition
Density
Boiling point
Melting Point
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Term
Tell the number of protons, neutrons, and electrons in the following;
Cl - 35 |
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Definition
Cl - 35
Protons 17
Neutrons - 18
Electrons - 17 |
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Term
Tell the number of protons, neutrons, and electrons in the following:
28 +3
Al
13
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Definition
Protons - 13
Neutrons - 15
Electrons - 10 |
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Term
Which is an example of an isotope for
35 Br - 80 |
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Definition
34 Se - 80
80 Hg - 200
35 Br - 81 |
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Term
In the nuclear reaction;
U-238 --> Th 234 + ____
what is the other product? |
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Definition
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Term
| which particle results in the product's atomic number increasing by 1? |
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Definition
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