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Chemistry Semester Exam
Chemistry Semester Exam
49 terms
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Review for chemistry course Baker Co Schools
Flashcards
49 cards
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Practice quiz
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Questions
49
Answers
1
How many electrons does the 'p' level hold?
6
14
2
10
2
Discovered electrons in a cathode ray tube, credited with 'plumb pudding' model of the atom
Dalton
Thompson
Bohr
Democritis
3
A _______ is always a ______ , but a ______ is not always a ______.
molecule/compound, compound/molecule
compound/molecule, molecule/compound
4
Someone who is dehydrated would be considered...
hypotonic
hypertonic
isotonic
dead
5
Carbon 12 and 14 would be considered...
isotopes
ions
isomers
symbols
6
Elements show trends across the periodic table, called...
periodicity
enthalpy
electronegativity
atomic theory
7
Why are elements in groups 1-8?
because of their atomic numbers
because of the number of electrons in their outer shell
because of the number of electron shells
because of their atomic mass
8
The variable that is considered unknown and measured
dependent
independent
9
Metallic bonds- their valence electrons...
lose and gain
stay put
share
move around in a sea
10
What does the picture show for law safety?
Hot
Corrosive
Animal safety
Broken glass
11
Find the density of a rock that displaces 8.5 mL of water and weighs 12.3 grams.
0.69 g/mL
104.5 g/mL
0.7 g/mL
1.4 g/mL
12
Name the reversible change...
endothermic
physical
exothermic
chemical
13
The atomic number is the number of....
electrons
neutrons
protons
protons and neutrons
14
The rule that states atoms have to have 8 electrons in their outer shell.
The rule of 8
Octet rule
Aufbaugh principle
isotopic notation
15
Add using significant figures: 123.6 + 0.99
125
124
124.6
124.59
16
Which element doesn't have to obey the octet rule?
Aluminum
Palladium
Neon
Hydrogen
17
Which is a metalloid?
Al
As
Au
Ag
18
What is the ground state configuration for oxygen?
1s22s22p4
1s22s22p6
1s22s22p2
1s22s23p4
19
How many neutrons in Gold?
118
117
197
79
20
Subtract using significant figures: 123.6 - 0.99
122.6
122
123
122.61
21
Find the pure substance
spaghetti and meatballs
silver
coffee
oil and vinegar
22
A negatively charged ion is called a...
cation
anion
23
Abbreviated notation backs up to the nearest...
transition metal
metalloid
noble gas
halogen
24
A reaction that GIVES OFF heat...
nuclear
enthalpy
endothermic
exothermic
25
The father of the modern atom. 3 laws of matter, developed atomic theory.
Rutherford
Democritis
Dalton
Bohr
26
F, Cl, Br, I are all...
halogens
nonmetals
group 8
gases
27
Covalent bonds are between...
a metal and a nonmetal
two nonmetals
a metalloid and a non metal
two metals
28
Name the compound
H2
N2
N2O
O2
29
Sugar dissolves in water, so it becomes the ...
solution
solute
solvent
suspension
30
Why are elements placed in periods?
because of their atomic numbers
because of their atomic mass
because of the number of electrons in their outer shell
because of the number of electron shells
31
Write in scientific notation 9,300,000
9.3 x 10-6
9.3 x 106
9.3 x 107
9 x 106
32
Which one is numerical data?
qualitative
quanitative
33
How many significant figures? 100.0
1
4
3
5
34
Add using scientific notation: (9.6 x 10
6
) + (3.3 x 10
6
)
1.3 x 107
1.29 x 107
1.29 x 106
1.3 x 106
35
Subtract using significant figures: 999.12 - 0.99
998
998.3
998.1
998.13
36
Add using significant figures: 1001 + 0.99
1001.99
1001
1002
1000
37
Plasma is a superheated gas where the ____ have separated from the nucleus.
electrons
neutrons
neutrinos
protons
38
Which mixture is mixed EVENLY throughout?
heterogenous
homogenous
39
Which flask?
Florence
Erlenmeyer
40
Ionic bonds are between...
two metals
two nonmetals
a metalloid and a non metal
a metal and a nonmetal
41
Which element listed is in period 6?
Lead
Hydrogen
Tellurium
Tin
42
Write in standard form: 8.7 x 10
-12
8,700,000,000,000
0.000000000087
87,000,000,000,000
0.0000000000087
43
The current accepted atom model
Bohr
Electron Cloud
Tiny Balls
Plumb Pudding
44
A group of elements that has a full valence shell naturally.
alkali metals
valences
noble gasses
halogens
45
How do you find the number of neutrons?
subtract atomic mass from atomic number
add the mass and the atomic number
subtract atomic number from atomic mass
divide the mass and atomic number
46
A well tested set of observations based on long term collection of evidence
law
hypothesis
scientific method
theory
47
How many significant figures? 100
3
1
5
4
48
5 arrows hitting to the left of the target bullseye but in the same spot
neither
both
precision
accuracy
49
How many significant figures? 10023
3
1
5
4
