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Chemistry Midterm
Chemistry Midterm
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Chemistry high school midterm review
Flashcards
41 cards
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Practice quiz
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Questions
41
Answers
1
What group # is the halogens located?
2A
3A
1A
7A
2
Which is an example of a compound?
ice
sodium
soil
milk
3
Who mathematically proved the existence of atoms and molecules?
Galileo
Einstein
Newton
Lavosier
4
What is the correct formula of magnesium hydroxide?
MgOH
MgO
Mg(OH)2
Mn(OH)2
5
What is the state of change that a solid become a liquid?
freezing
sublimation
evaportaion
melting
6
Which has 5 significant figures?
15.600
15.60
15.6
15.6000
7
What has indefinite shape and definite volume?
gas
plasma
liquid
solid
8
How many electrons does a neutral atom with an atomic # of 40 and a mass # 91?
37
40
91
51
9
Which way is an incorrect way to show 4 significant figures?
4.000 x 103
4000.
4000
10
Based on the 1st Law of Matter, which is true?
mass of reactants > mass products
mass reactants < mass of products
Mass of reactants = mass of products
11
How many neutrons does a neutral atom with an atomic # of 40 and a mass # 91?
37
51
91
40
12
Who developed the planetary model?
Bohr
Schrodinger
Thomson
Rutherford
13
The diatomic molecules are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine.
false
true
14
What does (aq) mean?
dissolved in water
solid formed
released as a gas
15
Who is the Father of Chemistry?
Mendeleev
Lavosier
Aristotle
Democritus
16
Who developed the plum pudding model?
Rutherford
Schrodinger
Thomson
Bohr
17
A _______measurement is based on observations, not measurements and calculations.
quantitative
scientific
qualitative
18
Most elements are in what type: metal, nonmetal, or metalloid?
metal
nonmetal
metalloid
19
What is the correct formula of iron (III) carbonate?
FeCO3
Fe3C
Fe<font size="2">2(</font>CO3)3
Fe3CO3
20
Which is an example of a homogenous mixture?
milk
sodium
soil
ice
21
What is an example of a physical change?
heating water to steam
burning paper
Cooking egg
22
What is the state of change that a solid become a gas?
sublimation
freezing
melting
evaportaion
23
Balance the equation, Ca + O
2
--> CaO
2Ca + O2 --> 2CaO
Ca + O2 --> 2CaO
2Ca + O2 --> CaO
Ca + O2 --> CaO
24
How many atoms are present in 3 Mg(C
2
H
3
O
2
)
2
?
24
30
45
15
25
Most elements are in what phase?
gas
liquid
solid
26
How many electrons does a cation of +3 with an atomic # of 40 and a mass # 91?
51
37
40
91
27
What is the correct formula of hexanitrogen heptachloride?
NCl7
N6Cl6
N6Cl7
NCl6
28
What group # is the alkaline earth located?
3A
2A
7A
1A
29
Who wrote the 1st atomic theory and did
not
know about protons, neutrons, & electrons?
Dalton
Rutherford
Thomson
Einstein
30
What group # is the alkalis located?
2A
3A
7A
1A
31
Who is the Father of Periodic Table?
Mendeleev
Aristotle
Democritus
Lavosier
32
Name the process that is
endo
thermic
gas into solid
solid into liquid
liquid into solid
gas into liquid
33
Who believed the world is made of 4 earthly elements?
Aristotle
Democritus
Lavosier
Mendeleev
34
Which is an example of an element?
milk
sodium
soil
ice
35
What has indefinite shape and indefinite volume?
liquid
plasma
solid
gas
36
What is maximum # electrons a f-sublevel can hold?
6
2
14
10
37
Who proposed the world is made of tiny indivisible cut particles?
Lavosier
Aristotle
Democritus
Mendeleev
38
Who developed the electron cloud model?
Bohr
Rutherford
Schrodinger
Thomson
39
Who discovered the nucleus?
Dalton
Thomson
Rutherford
Einstein
40
What is the correct formula of nitric acid?
HNO3
HNO2
H3N
HN
41
Calculate the density of 25.0g with a volume of 36.0 mL.
1.44 g/mL
.694 g/mL
9.00 x 102 g/mL
