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Chemistry Final Semester 1 Flashcards | StudBud
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Chemistry Final Semester 1
Chemistry Final Semester 1
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Flashcards
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Questions
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Answers
1
what are the product when sucrose is heated and decomposes to form carbon dioxide and water?
sucrose
carbon dioxide
carbon dioxide and water
water
2
which subatomic particle has the greatest part in determining properties of an element?
neutrons
electrons
protons
nucleus
3
which lists only
physical
changes?
tarnish and boil
mix and burn
rust and bubble
evaporate and fold
4
what is the trend of ionization energy?
decrease left to right, increase down
increase left to right, decrease down
5
what is the electron configuration of calcium(Ca) ?
1s22p63s24s2
1s22s22p63s23p64s2
1s22s23p76
1s22s22p63s23p64s4
6
what is the trend of atomic radius?
decrease left to right, increase down
increase left to right, decrease down
7
what is 0.00000000763 in scientific notation?
-7.63 x 109
7.63 x 10-9
1.23 x 10-9
7.63 x 109
8
what is a heterogeneous mixture?
each sample has a different composition
same throughout
saltwater
one substance is dissolved in another
9
a solid has...
neither definite shape nor volume
a definite shape and volume
a definite volume only
a definite shape only
10
what are the most stable electron configurations?
shells with three outer electrons
full and half full outershells
20 electrons
half full outershells
11
how many energy sublevels are in each of the first four principle energy levels?
1, 2, 3, 4
2, 25, 170, 900
1, 3, 5, 7
2, 6, 10, 14
12
what is the nucleus of an atom composed?
protons and neutrons, + charge
protons and electrons, - charge
neutrons, no charge
nuceloli, +- charge
13
which has only
physical
properties?
color, mass, shape
flammability, oxidation, texture
boiling point, conductivity, volume
reactivity, combustion point, state of matter
14
electrons entering the lowest energy first is the execution of what principle?
bohr
hans
hyde
aufbau
15
what is the difference between independent and dependent variables?
the IV is measured after the DV is manipulated
the IV is thrown and the DV catches it
the IV is changed by the experimenter and the DV is measured
the IV is changed and the DV stays the same
16
why was Dalton's theory that "atoms are tiny indivisible particles" revised over a century ago?
the sun died
subatomic particles were discovered
atoms are yucky
atoms explode
17
what is a theory?
a well-tested explanation for a broad set of questions
an idea that won't change
something that is proven to be right in every experiment
a thing scientist think is true
18
which prefix has the smallest value?
centi
nano
hecto
micro
19
what is another name for the Group A elements?
transition elements
representative elements
transition metals
alkali metals
20
where are protons and electrons in Bohr's atomic model?
protons in nucleus; electrons orbit nucleus
protons and electrons orbit nucleus
electrons in nucleus; protons orbit nucleus
electrons and protons in nucleus
21
is Ca or Ga larger?
Ca
Ga
22
a liquid has...
neither definite shape nor volume
a definite shape only
a definite volume only
a definite shape and volume
23
what is (3 x 10
-6
)(4 x 10
11
) ?
12 x 105
12 x 10-17
12 x 10-5
12 x 1017
24
what is the reactant when sucrose is heated and decomposes to form carbon dioxide and water?
sucrose
air
water
carbon dioxide
25
what is a homogeneous mixture?
same composition throughout
peanut butter and jelly
each sample has different composition
the solute is dissolved in the solvent
26
one milliliter is equal to...
1 centimeter3
4000 decimeters
3 feet
1 centimeter
27
what is another name for the Group B elements?
representative elements
alkali earth metals
transition elements
metals
28
what happens when an electron moves from a lower to higher energy level
it gets closer to the nucleus
its shape changes
its orbit speed increases
it moves farther away from the nucleus
29
which prefix has the largest value?
deci
milli
kilo
hecto
30
how do you calculate the number of neutrons when given the atomic number and mass number?
mass number - atomic number
number + atom
atomic number - mass number
atomic number + mass number
31
which has only
chemical
properties?
flammability, combustion point, conductivity
shape, mass, state of matter
boiling point, texture, oxidation
reactivity, volume, color
32
which lists only
chemical
changes?
mix and fold
rust and cut
bubble and color change
evaporate and tarnish
33
a substance that can be separated into two or more substances by only chemical means is a...
compound
taco
mixure
substance
34
what is the trend of electronegativity?
increase left to right, decrease down
decrease left to right, increase down
35
what is a substance?
one particle dissolved in another
the smallest form of an element that retains its properties
matter w/ uniform&definite composition; compound or element
combination of particles; can be separated by physical means
36
what does the mass number represent?
1 + atomic number
protons + neutrons
the reactivity of the element
electrons + protons
37
which atomic model tells the probability of finding an electron in a certain position?
physical
quantum mechanical
Moseley's
Bohr's
38
who determined the quantity of charge carried by an electron?
Gracie Distler
Niels Bohr
Santa Claus
Robert Millikan
39
in what way is the modern periodic table arranged?
decreasing atomic mass
increasing atomic number
increasing atomic mass
decreasing atomic number
40
a gas has...
a definite shape only
a definite shape and volume
a definite volume only
neither definite shape nor volume
41
the smallest possible particle of an element that retains its identity in a chemical reaction
compound
element
neutron
atom
42
what is accuracy?
closeness to one point
closeness to a group of points
everyone getting 7
when you hit the bull's eye
43
what does the atomic number represent?
atomic volume
mass
number of protons
number of neutrons
44
what is precision?
closeness to one point
closeness to a group of points
45
how many
orbitals
are in each sublevel?
1, 2, 3, 4
4, 5, 78, 100
1, 3, 5, 7
2, 6, 10, 14
