Chem 121 Exam 1 Study Guide Complete Questions Full Solution

CHEM 121 EXAM 1 STUDY GUIDE COMPLETE QUESTIONS FULL SOLUTION
CHEM 121 EXAM 1 Questions and Answers Verified
Solutions Latest Update 2026/2027

Question:
Chemistry

Answer:
the study of matter and how it changes



Question:
Matter

Answer:
anything that takes up space and has mass



Question:
Element with examples

Answer:
A pure substance that cannot be separated, anything on the periodic table



Question:
Compound

Answer:
A substance made up of atoms of two or more different elements joined by chemical bonds, CO2,
NaCl



Question:
homogenous mixture (solution)

,Answer:
mixtures that are uniform in composition



Question:
heterogeneous mixture

Answer:
A mixture that is not uniform in composition; components are not evenly distributed throughout the
mixture



Question:
Physical Properties

Answer:
the characteristics of a substance that can be observed or measured without changing the substance,
color, density, boiling/melting points, solubility, conductivity



Question:
Chemical Properties

Answer:
Characteristic that cannot be observed without altering the substance, burning, rusting, reactivity



Question:
physical change

Answer:
A change in a substance that does not involve a change in the identity of the substance



Question:
chemical change

, Answer:
A change in matter that produces one or more new substances



Question:
How are mixtures seperated?

Answer:
by physical processes such as filteration, crystalation,simple distiliation, fractional distilation and
chromotograpghy.



Question:
How are compounds seperated?

Answer:
Only by chemical reactions.



Question:
Antimony

Answer:
Sb



Question:
Aluminum

Answer:
Al



Question:
Argon

Answer: