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Chapter 2 Review Flashcards | StudBud
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Chapter 2 Review
Chapter 2 Review
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Atom, Molecules, and Ions
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Questions
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Answers
1
Which of the following is a molecular compound?
NaNO3
H2
NaCl
AgCl
2
Groups on the table, like the halogens....
are all solids at room temp
have the same atomic number
have very similar chemical properties
have the same number of electrons
3
Name the following: CaCl2
monocalcium chloride
calcium chloride
calcium (II) chloride
calcium dichloride
4
Which of the following forms a 2+ charge in ionic compounds?
Be
All form +2 charges
Mg
Ca
5
Which of the following forms -2 charges in ionic compounds?
Cl
S
I
F
6
What is the atomic mass of pure hydrogen gas? hint: HONClBrIF
1.01 amu
4 amu
1 amu
2.02 amu
7
Which of the following has 10 neutrons?
Carbon-13
Nitrogen-28
H-3
Neon-20
8
What of the following describes the consistent purity of substances?
Law of Constant Composition
Law of Conservation of Energy
Law of Conservation of Energy
Law of Conservation of Mass
9
What is the charge of Cobalt in cobalt (III) oxide
2-
3+
3-
2+
10
Which of the following would be considered applications of isotopes?
cancer treatment
all are applications
radiometric dating like uranium dating
medical imaging
11
Write the chemical formula for iron (III) oxide
Fe3O2
Fe2O3
FeO2
FeO
12
Approximately, what is the percent comp. by mass of hydrogen in HCl?
50%
10%
3%
5%
13
Thomson made a landmark discovery in chemistry shattering Dalton's posulates, what was this land mark disovery?
first subatomic particle
law of conservation of mass
dense central nucleus
first identification of isotopes
14
Properties of matter are developed from the properties and behavior of subatomic particles. Which regards nuclear stab?
N/A
electron
neutron
proton
15
Which of the following elements would you expect to have a charge of 2+ in ionic compounds?
Mg
S
Cf
Na
16
Which law is demonstrated in this model?
law of constant composition
law of multiple proportion
law of definite proportion
law of conservation of mass
17
How many neutrons are found in the nucleus of the most common H isotope, Hydrogen-1?
1
0
3
2
18
Which of the following would be most likely to form an anion?
Ca
I
Al
Au
19
The route of the negative charge in atoms is from a lepton particle on the standard model known as the.....
electron
n/a
neutron
proton
20
Which of the following would you expect to be a poor conductor?
Zn
N2
Au
Cu
21
The first appearance of atoms as a concept is traced through historical records to.....
Rutherford
Democritus, a Greek philosopher
John Dalton
Aristotle
22
What is the charge of chlorine in NaCl?
-2
-1
-2
+1
23
In the interactive exercise, all of the following are proof that EM is stronger than gravity except?
the observation that a magnet stays firmly stuck to the wall
being able to lift a partner's hair with a charged balloon
bending water with static
the cloud chamber and radioactivity being visualized
24
There are 118 unique elements, seemingly infinite number compounds, but only ____ types of charge.
4
1
3
2
25
Name this dish
Chicken Biryani
Pad Thai
Pad See Ew
Lo Mein
26
The fact that pure MgO is always in a mass ratio of 1.52 : 1 in respects to the elements involved is a demonstration of
Law Definite Proportion
Law of Constant Composition
Law of Conservation of Matter
Law of Multiple Proportion
27
All of the following laws were used to support atomic theory except?
Law of Multiple Proporiton
Law of Conservation of Energy
Law of Definite Proportion
Law of Conservation of Mass
28
The concept of atoms is traced back through historical record to....who also brought us democracy, geometry and Olympics
Mayans
Native Americans`
Aztecs
Greeks
29
Based on its average atomic mass, which would you suspect is the most abundant isotope of sodium?
Na - 25
Na - 22
Na - 23
Na - 24
30
Which of the following laws best describes the fact that atoms are not "lost" in normal chem. reactions?
law of multiple proportion
law of constant composition
law of def. proportion
law of conservation of mass
31
Which subatomic particle governs the identity of chemical elements?
N/A
the neutron
the proton
the electron
32
Name the following compound: CuO
Copper oxide
Copper monoxide
Copper (II) Oxide
Copper (I) Oxide
33
The conventionally assigned (+) charge in electrostatics is routed in the proton, and the (-), the electron
False
True
34
Atomic nuclei hold on to electric charges through the force of gravity
True
False
35
Which of the following was NOT described in Dalton's postulates?
matter is made of atoms
matter combines in fixed ratios based on mass
masses of the same elements can differ from one another based on neutrons
atoms are indivisible
36
What does atomic theory state?
Atoms are indivisible spheres of mass.
Atoms make up compounds.
Atoms can be rearranged to form new elements.
All matter is made up of tiny particles called atoms.
37
Name this food item
Garlic Bread
Tortilla
Brioche
Naan
38
Which of the following finds stability by accepting 1 electron?
F
S
P
O
39
Which element has 17 protons?
O
Cl
Ne
He
40
In a pure element, the charge of the electrons is neutralized by the
neutrons
n/a
other electrons
protons
41
Electromagnetism is stronger (10^42 times) than gravity.
False
True
42
The mass ratio (C:O) is 1:1.33. It would be predicted that the mass ratio of CO2 according to Law of mult. prop....
1:2.67
1:1.33
1:3
1:2
43
What is the atomic number of gold?
14
180
79
80
44
Which of the following is a molecular substance?
CaCl2
AgI
NaCl
O2
45
Which force is dominant in atomic structure and chemical bonding?
Strong Nuclear
Gravity
Weak Nuclear
Electromagnetism
46
Thomson reasoned that the charge of the cathode ray was made of negative charges was because
it was pulled towards the negative end of the electric field
it was delected more than an atom would be predicted
n/a the cathode ray was not altered in its course
it was pulled towards the positive end of the electric field
47
I am ready for the test.
True
False
48
Name this dish.
Butter Chicken
Chicken Noodle Soup
Teriyaki Chicken
Chicken Alfredo
49
How many significant figures are represented in 0.1001
1
4
2
3
50
Which of the following is best discussed and analyzed as a molecule, rather than a formula unit of a solid?
CH4
MgO
AgCl
NaCl
51
Which of the following was discovered by Rutherford?
Nucleus
Mass of electron
Neutron
Charge of electron
52
Which subatomic particle governs chemical reactivity and just about every concept addressed in chemistry?
electron
n/a
proton
neutron
53
CuO, has a mass ratio of 3.97:1, based on law multiple proportions, you would expect the mass ratio of Cu2O to be
2.5:1
4.5:1
7.94:1
1.5:1
54
In Thomson's famous experiment, the path of the electron was ___________ from the positive end of the electric field
unaffected
attracted
deflected
repulsed
55
Which of the following is likely to form a cation by vacating electrons from an outer orbital?
O
I
Be
S
56
Which of the following would NOT abide by law of constant comp?
Pure Gold (Au)
Glucose (C6H12O6)
NaCl
Air
57
Which of the following is a metalloid?
O
S
Zn
Si
58
Which of the following is always found as a homonuclear diatomic element in its pure state? (HONClBrIF!)
He
O
S
C
59
All of the following are true regarding elements that are isotopes except.
They have the same mass #
They have the same number of protons
Their chemical properites are somewhat similar
They have the same atomic number
60
Which of the following from +1 charges by losing 1 electron?
Na
Ca
F
Al
61
Which of the following would you expect to be the least effective at conducting electricity (non metal!) ?
Cl
Au
Ti
Cu
