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Standard Chemistry Semester Exam Review 2017 BMCHS Flashcards | StudBud
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Standard Chemistry Semester Exam Review 2017 BMCHS
Standard Chemistry Semester Exam Review 2017 BMCHS
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Students will be tested on their knowledge of Units 1-4.
Flashcards
46 cards
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Practice quiz
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Host live
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Questions
46
Answers
1
Round 4.1534 x 10^15 to two significant figures.
4.1534
4.2^15
4.2 x 10^15
4.15 x 10^15
2
Melting ice is an example of a ___________.
chemical change
physical change
3
Atoms of the same element with differing number of electrons are called ________.
elements
isotopes
ions
4
What is the complete symbol for a cobalt atom with a mass number of 60?
C
D
A
B
5
How does atomic size change as you move down a group on the periodic table?
Stays the same
Increases
Decreases
6
Round 56.468994 to six significant figures.
56.47
56.469
56.4690
56.4689
7
Does the following represent a chemical or physical change?
Chemical
Both
Physical
8
Which subatomic particle is used to identify the atom, as it never changes?
Neutron
Electron
Proton
9
Does the following represent a chemical or physical change?
Both
Physical
Chemical
10
How many electrons does the following ion have?
10
22
14
12
11
What does a chemical change result in?
A change in the way atoms are arranged in space.
A phase change in the substance (ex. liquid to solid)
A change in the way atoms are bonded to each other.
A change in texture of the substance.
12
How are elements in the periodic table organized?
Alphabetically
Based on physical and chemical properties
Most reactive to least reactive
Increasing number of electrons
13
Does the following represent a chemical or physical change?
Chemical
Both
Physical
14
A positive ion is called ________.
a cation
an anion
15
Which of the following atoms would be most likely to lose an electron?
Li
Rb
At
F
16
Which subatomic particle has the smallest mass?
neutrons
protons
electrons
17
Which of the following describes an anion?
protons=8, neutrons=8, electrons=10
protons=8, neutrons=8, electrons=6
protons=8, neutrons=8, electrons=8
protons=8, neutrons=10, electrons=8
18
How many neutrons are in the nucleus of the following atom:
155
108
47
61
19
Properties that describe how a substance looks, feels, state of matter, etc. are?
Physical properties
Chemical properties
20
How many electrons does the following ion have?
3
14
7
10
21
Which pair of elements would have similar properties due to the position in the periodic table?
Calcium (Ca), Helium (He)
Aluminum (Al), Zinc (Zn)
Lithium (Li), Beryllium (Be)
Copper (Cu), Gold (Au)
22
Most elements on the periodic table are classified as __________.
Nonmetals
Gases
Metalloids
Metals
23
What is the complete symbol for a sodium ion?
B
C
A
D
24
Round 3.2493 to two significant figures.
3.25
3.2
3.30
3.3
25
Which of the following is an example of a physical change?
Burning a piece of paper
Baking soda and vinegar reacting together
A glass falling and shattering on the floor
Baking a birthday cake
26
The number of protons + neutrons in an atomic nucleus is referred to as what?
Atomic number
Mass number
Isotope number
27
What does the atomic number identify?
The number of neutrons of a given atom.
The number of protons of a given atom.
The number of protons + neutrons of a given atom.
The number of elections of a given atom.
28
Which of the following halogens has the greatest affinity for electrons?
Iodine
Astatine
Chlorine
Bromine
29
The majority of the mass of an atom comes from which subatomic particle(s)?
Neutrons + Protons
Protons
Protons + Electrons
Neutrons + Electrons
30
How many neutrons are in the isotope Carbon-14?
8
6
14
12
31
How many protons are in the following atom?
125
189
207
82
32
Which subatomic particle plays the greatest role in determining an atom’s chemical properties?
Neutron
Proton
Electron
33
Each horizontal row on the periodic table is called what?
Group
Period
34
Chemistry studies which of the following
human control over nature
what living organisms do through studying their molecules
how matter behaves through studying atoms and molecules
gravitational force interactions
35
Which group of elements has the has the lowest ionization energies?
Transition metals
Alkali metals
Halogens
Alkaline earth metals
36
Which of the following atoms would have the highest ionization energy?
Chlorine
Francium
Zinc
Tin
37
Does the following represent a chemical or physical change?
Chemical
Physical
Both
38
The energy required to remove an electron from a gaseous atom is called what?
Bond energy
Ionization energy
Electronegativity
Electron energy
39
Groups on the periodic table are arranged
Vertically
Horizontally
40
Smaller atoms tend to have high ionization energies.
False
True
41
When iron is exposed to water vapor and air, it rusts. This is an example of a ________ change.
both
physical
chemical
42
Properties that a substance exhibits when changing its composition are called:
Physical properties
Chemical properties
43
Which model of the atom is used today?
Billiard Ball Model
Quantum-Mechanical (Electron Cloud) Model
Plum Pudding Model
Bohr Model
44
An ion with a positive charge __________.
contains the same amount of electrons as the neutral atom.
contains more electrons than the neutral atom
contains less electrons than the neutral atom
45
What is the mass-form for the isotope with 38 protons and 50 neutrons?
Stronium-88
Tin-88
Stronium-50
Tin-50
46
Why are atoms electrically neutral?
Protons and electrons cancel out each other’s charge.
There are more protons than electrons in atoms.
Neutrons carry no charge.
The neutrons balance out any charge.
