Delgado CHEM 141--Test 1 (Chapters 1-2)
Practice Questions and Answers
submicroscopic particles - Answer️️ -atoms
building blocks of matter - Answer️️ -atoms (and elements)
two or more atoms attached in specific geometrical arrangements -
Answer️️ -molecules
science that seeks to ...
mixtures with uniform composition; mixed uniformly - Answer✔️✔️-
homogeneous mixture
mixtures with un-uniform composition; not mixed uniformly -
Answer✔️✔️-heterogeneous mixture
any property that is measurable; observable - Answer✔️✔️-physical
property
any property that is observed during a reaction in which the
chemical composition/identity of the substance is changed -
Answer✔️✔️-chemical property
any property whose value depends on the quantity of matter;
cannot be used to identify what type of matter something is -
Answer✔️✔️-extensive
any property whose value is independent of the quantity of matter;
used to identify type of matter - Answer✔️✔️-intensive
When matter undergoes a chemical/physical change, what happens
to energy? - Answer✔️✔️-changes as well
What does the Law of Conservation of Energy say? - Answer✔️✔️--
the total amount of energy remains constant in an isolated system
- energy can neither be created nor destroyed, but it can change
from 1 form to another
3
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