chemistry prelim reviewer
問題一覧
1
All ________ is particulate in nature.
matter
2
_____is the fourth state of matter
plasma
3
can exist in one of three main states: solid, liquid, or gas.
matter
4
is an ionized gas, a gas
into which sufficient energy is provided to free electrons from atoms or molecules and to allow both
species, ions and electrons, to coexist.
plasma
5
________is composed of tightly packed particles
solid matter
6
_________is made of more loosely packed particles
liquid matter
7
___________is composed of particles packed so loosely that it has neither a defined shape nor a
defined volume.
gaseous matter
8
_________such as density and colour, do not depend on the amount of the
substance present.
intensive properties
9
___________can be measured without changing a
substance's chemical identity
physical properties
10
__________ can be measured only by changing a
substance's chemical identity
chemical properties
11
The most basic form of filtration is using gravity to filter a mixture
general filtration
12
Chemical laboratory process used to separate mixtures.
decanting
13
You can filter sea water to remove any debris and slowly evaporate the water by heating the
filtrate in an evaporating dish until salt crystals start forming
evaporation
14
Uses gravity and centrifugal force to separate particles heavier than the liquid
medium
centrifugation
15
_____ spin the material at high rotation speeds and separate the particulate
from the liquid.
centrifuges
16
Is a method used by scientists for separating organic and inorganic compounds so that they
can be analyzed and studied.
chromatography
17
__________is the process of separating suspended solid matter from a liquid, by causing the latter to pass
through the pores of some substance, called a filter.
filtration
18
what are the different types of measurement scales
nominal, ordinal, interval, ratio
19
It involves assigning numbers to characteristics of objects or events in such a way that the
numbers reflect reality.
measurement
20
Is how close measure values are to each other, basically how many decimal places are at the
end of a given measurement.
precision
21
Is how close a measure value is to the true value.
accuracy
22
Accuracy matters too, but it's best when measurements are both precise and accurate
true
23
______is defined as the difference between the true or actual value and
the measured value.
measurement error
24
______are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.
significant figures
25
___________is the mass of an object divided by its
volume.
density
26
All matter is made up of tiny particles called______
atom
27
Each atom is made up of smaller particles______,______,______
electron, proton, neutron
28
States that matter can neither be created nor destroyed. This law was put forth by Antoine
Lavoisier 1789
law of conservation of mass
29
This law was given by a French chemist joseph proust. He stated that a given compound always
contains exactly the same proportion of element by weight.
law of definite proportions
30
two or more elements can combine to form different compounds in whole-number ratios
law of multiple proportions
31
In atomic physics and quantum chemistry, the electron configuration is the distribution of
electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.
atomic structure
32
is a subatomic particle, symbol e⁻ or β⁻ , whose electric charge is negative one
elementary charge
electron
33
is a subatomic particle, symbol p or p⁺ , with a positive
electric charge of +1e elementary charge and a mass slightly less
than that of a neutron
proton
34
is a subatomic particle, symbol n or n⁰ , with
no electric charge and a mass slightly greater than that of a
proton
neutron
35
Are neutral particles made of two or more
atoms bonded together.
molecules
36
Is a positively or negatively charged particle.
ion
37
the ion that losses e
cation
38
the ion that gains e
anion
39
_______ are the elements that have the same atomic no. but different in atomic mass.
isotopes
40
A set of chemical symbols showing the elements present in a compound and their relative
proportions and in some cases the structure of the compound.
chemical formulas
41
________Is the calculation of reactants and products in chemical reactions
stoichiometry
42
It is used as the bridge between chemistry on the atomic and macroscopic scale
atomic mass
43
The concept of the mole can be used to convert between mass and number of
particles.
avogadros no
44
The number 6.022 × 10²³ is known as________
avogadros number
45
__________is calculated from a molecular formula by dividing the mass of a single
element in one mole of a compound by the mass of one mole of the entire compound.
percent composition
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47問 • 2年前問題一覧
1
All ________ is particulate in nature.
matter
2
_____is the fourth state of matter
plasma
3
can exist in one of three main states: solid, liquid, or gas.
matter
4
is an ionized gas, a gas
into which sufficient energy is provided to free electrons from atoms or molecules and to allow both
species, ions and electrons, to coexist.
plasma
5
________is composed of tightly packed particles
solid matter
6
_________is made of more loosely packed particles
liquid matter
7
___________is composed of particles packed so loosely that it has neither a defined shape nor a
defined volume.
gaseous matter
8
_________such as density and colour, do not depend on the amount of the
substance present.
intensive properties
9
___________can be measured without changing a
substance's chemical identity
physical properties
10
__________ can be measured only by changing a
substance's chemical identity
chemical properties
11
The most basic form of filtration is using gravity to filter a mixture
general filtration
12
Chemical laboratory process used to separate mixtures.
decanting
13
You can filter sea water to remove any debris and slowly evaporate the water by heating the
filtrate in an evaporating dish until salt crystals start forming
evaporation
14
Uses gravity and centrifugal force to separate particles heavier than the liquid
medium
centrifugation
15
_____ spin the material at high rotation speeds and separate the particulate
from the liquid.
centrifuges
16
Is a method used by scientists for separating organic and inorganic compounds so that they
can be analyzed and studied.
chromatography
17
__________is the process of separating suspended solid matter from a liquid, by causing the latter to pass
through the pores of some substance, called a filter.
filtration
18
what are the different types of measurement scales
nominal, ordinal, interval, ratio
19
It involves assigning numbers to characteristics of objects or events in such a way that the
numbers reflect reality.
measurement
20
Is how close measure values are to each other, basically how many decimal places are at the
end of a given measurement.
precision
21
Is how close a measure value is to the true value.
accuracy
22
Accuracy matters too, but it's best when measurements are both precise and accurate
true
23
______is defined as the difference between the true or actual value and
the measured value.
measurement error
24
______are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.
significant figures
25
___________is the mass of an object divided by its
volume.
density
26
All matter is made up of tiny particles called______
atom
27
Each atom is made up of smaller particles______,______,______
electron, proton, neutron
28
States that matter can neither be created nor destroyed. This law was put forth by Antoine
Lavoisier 1789
law of conservation of mass
29
This law was given by a French chemist joseph proust. He stated that a given compound always
contains exactly the same proportion of element by weight.
law of definite proportions
30
two or more elements can combine to form different compounds in whole-number ratios
law of multiple proportions
31
In atomic physics and quantum chemistry, the electron configuration is the distribution of
electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.
atomic structure
32
is a subatomic particle, symbol e⁻ or β⁻ , whose electric charge is negative one
elementary charge
electron
33
is a subatomic particle, symbol p or p⁺ , with a positive
electric charge of +1e elementary charge and a mass slightly less
than that of a neutron
proton
34
is a subatomic particle, symbol n or n⁰ , with
no electric charge and a mass slightly greater than that of a
proton
neutron
35
Are neutral particles made of two or more
atoms bonded together.
molecules
36
Is a positively or negatively charged particle.
ion
37
the ion that losses e
cation
38
the ion that gains e
anion
39
_______ are the elements that have the same atomic no. but different in atomic mass.
isotopes
40
A set of chemical symbols showing the elements present in a compound and their relative
proportions and in some cases the structure of the compound.
chemical formulas
41
________Is the calculation of reactants and products in chemical reactions
stoichiometry
42
It is used as the bridge between chemistry on the atomic and macroscopic scale
atomic mass
43
The concept of the mole can be used to convert between mass and number of
particles.
avogadros no
44
The number 6.022 × 10²³ is known as________
avogadros number
45
__________is calculated from a molecular formula by dividing the mass of a single
element in one mole of a compound by the mass of one mole of the entire compound.
percent composition