©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM
DELGADO COMMUNITY COLLEGE
Delgado CHEM 141--Test 1 (Chapters 1-2)
Practice Questions and Answers
submicroscopic particles - Answer✔️✔️-atoms
building blocks of matter - Answer✔️✔️-atoms (and elements)
two or more atoms attached in specific geometrical arrangements -
Answer✔️✔️-molecules
science that seeks to understand the behavior of matter by studying
the behavior of atoms and molecules - Answer✔️✔️-chemistry
scientific method steps - Answer✔️✔️-1. observation
2. experiments
3. hypothesis
4. law
5. theory
careful noting and recording of natural phenomena - Answer✔️✔️-
observation
procedures designed to test an idea - Answer✔️✔️-experiments
tentative explanation of a single or small number of observations -
Answer✔️✔️-hypothesis
1
, ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM
DELGADO COMMUNITY COLLEGE
generally observed occurrence in nature - Answer✔️✔️-law
general explanation of natural phenomena - Answer✔️✔️-theory
physical states of matter - Answer✔️✔️-solid, liquid, gas
composition of matter - Answer✔️✔️-pure substances and mixtures
made of 1 type of particle; show the same intensive properties -
Answer✔️✔️-pure substances
types of pure substances - Answer✔️✔️-elements
compounds
pure substances that cannot be decomposed into simpler
substances by chemical reactions - Answer✔️✔️-elements
pure substances that can be decomposed into simpler substances
by chemical reactions - Answer✔️✔️-compounds
chemical combinations of elements - Answer✔️✔️-compounds
all molecules in a compound are __. - Answer✔️✔️-identical--same
behavior
most natural pure substance - Answer✔️✔️-compounds
made up of multiple types of particles; may show different intensive
properties - Answer✔️✔️-mixtures
2
, ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM
DELGADO COMMUNITY COLLEGE
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
DELGADO COMMUNITY COLLEGE
Delgado CHEM 141--Test 1 (Chapters 1-2)
Practice Questions and Answers
submicroscopic particles - Answer✔️✔️-atoms
building blocks of matter - Answer✔️✔️-atoms (and elements)
two or more atoms attached in specific geometrical arrangements -
Answer✔️✔️-molecules
science that seeks to understand the behavior of matter by studying
the behavior of atoms and molecules - Answer✔️✔️-chemistry
scientific method steps - Answer✔️✔️-1. observation
2. experiments
3. hypothesis
4. law
5. theory
careful noting and recording of natural phenomena - Answer✔️✔️-
observation
procedures designed to test an idea - Answer✔️✔️-experiments
tentative explanation of a single or small number of observations -
Answer✔️✔️-hypothesis
1
, ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM
DELGADO COMMUNITY COLLEGE
generally observed occurrence in nature - Answer✔️✔️-law
general explanation of natural phenomena - Answer✔️✔️-theory
physical states of matter - Answer✔️✔️-solid, liquid, gas
composition of matter - Answer✔️✔️-pure substances and mixtures
made of 1 type of particle; show the same intensive properties -
Answer✔️✔️-pure substances
types of pure substances - Answer✔️✔️-elements
compounds
pure substances that cannot be decomposed into simpler
substances by chemical reactions - Answer✔️✔️-elements
pure substances that can be decomposed into simpler substances
by chemical reactions - Answer✔️✔️-compounds
chemical combinations of elements - Answer✔️✔️-compounds
all molecules in a compound are __. - Answer✔️✔️-identical--same
behavior
most natural pure substance - Answer✔️✔️-compounds
made up of multiple types of particles; may show different intensive
properties - Answer✔️✔️-mixtures
2
, ©SOPHIABENNET@2024/2025 Thursday, August 22, 2024 1:01 AM
DELGADO COMMUNITY COLLEGE
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
