Chemistry - Midterm Review
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Chemistry - Midterm Review
Gotta Midterm Review
a proposed explanation for what is observed
the pursuit of chemical knowledge for its own sake
the field of chemistry that is concerned with the composition of matter
the means by which a society provides its members with those things needed and desired
applies science to the production of biological products or processes
describes an object that can be seen only under magnification
also called manipulative variable.
the variable that is changed during an experiment
describes many observations but does not explain them
the study of essentially all chemicals containing carbon
the science concerned with the composition of matter and the changes that matter undergoes.
a method of testing a hypothesis
information obtained directly from you senses
a logical approach to the solution of scientific problems
a well-tested explanation for a broad set of observations
the field of chemistry that is conceded with the composition of matter
an object that can be seen with the unaided eye.
matter with definite shape and volume
matter that has no definite shape or volume
matter that flows but has a definite volume
amount of matter that an object contains
substance present at the start of a reaction
substance formed in a chemical reaction
the simplest form of matter with a unique set of properties
a starting substance in a chemical reaction
contains two or more elements chemically combined in a fixed proportion
a part of a sample with a uniform composition and properties
homogeneous mixture; consists of solutes dissolved in a solvent
a change during which some properties of a material change, but the composition of the material does not change.
a ratio of equivalent measurements
temperature scale on which water freezes at 0 degrees Celsius and boils at 100 degrees Celsius.
a method of expressing numbers as a product of a coefficient and a power of ten
the degree of hotness or coldness of an object
a way to analyze and solve problems, using the units of the measurements.
a quantity that has both a number and a unit
the SI unit of length
the difference between the experimental value and the accepted value
the closeness of a measurement to the true value
the closeness of a measurement to other measurements
the smallest particle of an element that retains its identity in a chemical reaction
atoms with the same number of protons but different numbers of neutrons
the number of protons in the nucleus of an element
the total number protons and neutrons
a vertical column of elements in the periodic table
atomic mass unit
defined as 1/12 the mass of a carbon-12 atom
the central core of an atom, which contains most of the atom's mass
positively charged subatomic particles
negatively charged subatomic particles
an arrangement of elements according to the similarities in their properties
The _________________ is a logical approach to the solution of scientific problems.
Successful scientific outcomes are more likely when scientists collaborate and _____________________________________.
The composition of heterogeneous and homogeneous solution mixtures may ________________________________
contradict each other.
A sample containing two phases would be a ____________________________ mixture.
If you measure a value that is close to the true value, do your measurements become precise or accurate?
_______________ Atomic Theory stated that atoms of different elements can combine in simple, whole-number ratios.
The total number of protons and neutrons in an atom of Gold-86 is _______________
Physical or Chemical Reaction
1. carbon dioxide → carbon + dioxide
2. air → oxygen + nitrogen
3. salt water → water + sodium chloride
Calculate using the dimensional analysis method
Calculate the average atomic mass
Commonly used metric prefixes
contribute to the furthering of science?
He believed that atoms were indivisible and indestructible.
and what did the contribute to science?
By using experimental methods, Dalton transformed Democritus's ideas on atoms into a scientific theory.
discover with the use of the
? How did he do this?