NOVA CHM 111 Test 1 Exam 63 Questions with Verified Answers,100% CORRECT
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Course
NOVA CHM 111
Institution
NOVA CHM 111
NOVA CHM 111 Test 1 Exam 63 Questions with Verified Answers
Matter is... - CORRECT ANSWER Anything that has mass and occupies space (stuff)
Mass vs. Weight - CORRECT ANSWER Mass is a measurement of the amount of matter something contains, while Weight is the measurement of the pull of gravity...
NOVA CHM 111 Test 1 Exam 63 Questions with Verified
Answers
Matter is... - CORRECT ANSWER Anything that has mass and occupies space (stuff)
Mass vs. Weight - CORRECT ANSWER Mass is a measurement of the amount of
matter something contains, while Weight is the measurement of the pull of
gravity on an object.
Scientific Method - CORRECT ANSWER A series of steps followed to solve
problems including;
1.) Making an observation
2.) Forming a hypothesis
3.) Preforming an experiment
4.) Contribute to body of knowledge
5.) Observation becomes a law or theory
Extensive property - CORRECT ANSWER Depends on the amount of matter in a
sample
ex. Mass, volume, heat.
Intensive property - CORRECT ANSWER A property that depends on the type of
matter in a sample, not the amount of matter present.
ex. Density, temperature.
Physical property - CORRECT ANSWER A characteristic of a pure substance that
can be observed without changing its chemical composition.
ex. Density, color, hardness, melting/boiling points, electrical conductivity.
Chemical property - CORRECT ANSWER A characteristic of a pure substance that
describes its ability to change into different substances.
ex. Flammability, acidity, toxicity, reactivity of heat/ combustion.
, Physical change - CORRECT ANSWER A change in a substance that does not
involve a change in its chemical composition.
Chemical change - CORRECT ANSWER A change that occurs when one or more
substances change into entirely new substances with different chemical
composition.
Homogeneous - CORRECT ANSWER A mixture that is the same throughout
(Uniform composition, a solution)
Heterogeneous - CORRECT ANSWER a mixture that is not uniform in composition
(varies from point to point)
Pure substance - CORRECT ANSWER A substance made of only one kind of matter
and having definite properties.- Constant composition
Element - CORRECT ANSWER A pure substance made of only one kind of atom
and cannot be broken down into simpler substances by chemical changes.
ex. Gold (Au), phosphorous (Ph), oxygen (O2)
Compound - CORRECT ANSWER A substance made up of atoms of two or more
different elements joined by chemical bonds, can be broken down into simpler
substances by chemical changes. The properties of the compounds are different
than the properties of the uncombined elements making the compound.
ex. H2O, C6H12O6, Agcl
Protons - CORRECT ANSWER Positively charged subatomic particles located in the
nucleus
Neutrons - CORRECT ANSWER A subatomic particle of about the same mass as a
proton but without an electric charge, present in all atomic nuclei except those of
ordinary hydrogen.
Electrons - CORRECT ANSWER A subatomic particle that has a negative charge and
has a mass more than 1000x less than an atom - Located in the electron cloud (no
more than 2 electrons in the first cloud)
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