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Chemistry 121-Chapter 1, 2, 3 (Test 1) Exam with complete solutions 2024_2025.

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Chemistry 121-Chapter 1, 2, 3 (Test 1) Exam with complete solutions 2024_2025.

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Chemistry 121
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October 5, 2024
Number of pages
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Written in
2024/2025
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Chemistry 121-Chapter 1, 2, 3 (Test 1)
Exam with complete solutions 2024/2025




Atoms - ANSWER-submicroscopic particles, fundamental building blocks of
ordinary matter


Molecules - ANSWER-two or more atoms attached together in a specific
geometrical arrangement


Bonds - ANSWER-Attachments between particles that come in different sizes and
shapes


Chemistry - ANSWER-the science that seeks to understand the behavior of matter
by studying the behavior of atoms and molecules


Matter - ANSWER-Anything that occupies space and has mass, classified based
on state and composition


Divisions of Matter - ANSWER-Pure Substances and Mixtures


Division of Pure Substances - ANSWER-Elements and Compounds


Divisions of Mixtures - ANSWER-Homogenous(uniform throughout) and
Heterogenous

, Physical Properties - ANSWER-Characteristics of matter that can be changed
without changing its composition (directly observable)


Chemical Properties - ANSWER-Characteristics that determine how the
composition of matter changes as a result of contact with other matter or the
influence of energy(Describe behavior of matter)


Physical Changes in matter - ANSWER-Boiling point, State changes, dissolving
(anything that does not change the chemical composition)


Chemical Changes in Matter - ANSWER-Rusting(combining oxygen), burning,
dyes fade, changing color, combustion


Standard Units - ANSWER-Meter, kilogram, second, Kelvin


Mega - ANSWER-1,000,000


kilo - ANSWER-1,000


deci - ANSWER-.1


centi - ANSWER-.01


milli - ANSWER-.001


micro - ANSWER-.000001


nano - ANSWER-.000000001


pico - ANSWER-.000000000001


Mass - ANSWER-measure of the amount of matter present in an object

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