Chem 103 Module 1 Study
Questions With Correct Answers
Latest Update 2026
1. calorimetry - ANSWER study of how much heat is involved in temperature
or physical change
2. thermochemistry - ANSWER study of how much heat is involved in
chemical change
3. exothermic - ANSWER heat given off by (or extracted from) system as
process takes place ex using cold pack on injury, burning natural gas
4. endothermic - ANSWER heat absorbed by (or added to) system as process
takes place ex. melting ice
5. Combustion, oxidizing, exploding, baking, cooking - ANSWER 5 types of
chemical changes (heat/light, color change, gas, producing insoluble solid)
6. Melting, freezing, boiling, condensation, dissolving - ANSWER 5 types of
physical changes (easily reversible)
7. Name of the material is on the periodic table - ANSWER Question 1,
element
,8. Names of 2 elements or parts of the names are in the scientific name of the
substance - ANSWER Question 2, compound
9. Mixture appears to be one substance, layer, or color - ANSWER Question 3,
solution (homogeneous mixture)
10.Mixture appears to be more than one substance, layer, or color - ANSWER
Question 4, heterogeneous mixture
11.Accuracy - ANSWER nearness of measured value to actual value
12.Precision - ANSWER the degree of agreement among several measurements
of the same quantity
13.Adding or subtracting significant figures - ANSWER Round to number of
decimal places as those with fewest decimal places (L to R)
14.Multiplying or dividing significant figures - ANSWER Round to number of
significant figures as those with fewest significant figures (L to R)
15.Method of unit conversion - ANSWER new unit divided by old unit, 1 in
front of larger unit, multiply by number to be converted
16.atomic number - ANSWER smaller number on periodic table equal to
number of electrons (# of protons = # of electrons)
17.atomic charge - ANSWER 0 (# of protons - # of electrons)
,18.atomic weight - ANSWER larger number on periodic table (# of protons + #
of neutrons). Weighted average of mass numbers of the isotopes present in a
sample of the element. Decimal, round to nearest whole number to use.
19.Isotope - ANSWER different types of atoms of the same element (same #
protons and electrons, different numbers of neutrons)
20.False, they have different mass numbers - ANSWER True or False: Isotopes
have the same atomic number, charge, and mass
21.Ion - ANSWER a charged particle that forms when an atom gains or loses
one or more electrons. Resulting particle has fewer protons than electrons
(negative charge) or has more protons than electrons (positive charge)
22.Ionic charge - ANSWER # of protons - # of electrons = +n or -n
23.hepta - ANSWER seven
24.tetra - ANSWER four
25.binary ionic compounds - ANSWER 2 elements, metal + nonmetal
26.binary molecular compounds - ANSWER 2 elements, both nonmetals
27.non-binary ionic compounds - ANSWER 3+ elements, metal + polyatomic
group
28.binary acids - ANSWER hydrogen + nonmetal
, 29.non-binary acids - ANSWER hydrogen + polyatomic group
30.What is the one positively charged polyatomic group? What is it paired with?
- ANSWER ammonium, non-metal
31.What is the charge of all polyatomic groups containing chlorine? -
ANSWER -1
32.How many polyatomic groups containing chlorine are there? What are their
names? - ANSWER hypochlorite, chlorite, chlorate, perchlorate
33.Macroscopic domain - ANSWER large enough to be sensed directly by
human sight or touch
34.Microscopic domain - ANSWER objects too small to be sensed directly by
human sight or touch; visited in the imagination (or visible through
instruments like microscopes)
ex. atoms or molecules
35.Symbolic domain - ANSWER specialized language used to represent the
macroscopic & microscopic domain
ex. symbols, graphs, formulas, drawings, or equations
36.What are the 3 basic parts of a measurement? - ANSWER a number, a unit,
and indication of uncertainty
37.Exact numbers - ANSWER derived from counting
Questions With Correct Answers
Latest Update 2026
1. calorimetry - ANSWER study of how much heat is involved in temperature
or physical change
2. thermochemistry - ANSWER study of how much heat is involved in
chemical change
3. exothermic - ANSWER heat given off by (or extracted from) system as
process takes place ex using cold pack on injury, burning natural gas
4. endothermic - ANSWER heat absorbed by (or added to) system as process
takes place ex. melting ice
5. Combustion, oxidizing, exploding, baking, cooking - ANSWER 5 types of
chemical changes (heat/light, color change, gas, producing insoluble solid)
6. Melting, freezing, boiling, condensation, dissolving - ANSWER 5 types of
physical changes (easily reversible)
7. Name of the material is on the periodic table - ANSWER Question 1,
element
,8. Names of 2 elements or parts of the names are in the scientific name of the
substance - ANSWER Question 2, compound
9. Mixture appears to be one substance, layer, or color - ANSWER Question 3,
solution (homogeneous mixture)
10.Mixture appears to be more than one substance, layer, or color - ANSWER
Question 4, heterogeneous mixture
11.Accuracy - ANSWER nearness of measured value to actual value
12.Precision - ANSWER the degree of agreement among several measurements
of the same quantity
13.Adding or subtracting significant figures - ANSWER Round to number of
decimal places as those with fewest decimal places (L to R)
14.Multiplying or dividing significant figures - ANSWER Round to number of
significant figures as those with fewest significant figures (L to R)
15.Method of unit conversion - ANSWER new unit divided by old unit, 1 in
front of larger unit, multiply by number to be converted
16.atomic number - ANSWER smaller number on periodic table equal to
number of electrons (# of protons = # of electrons)
17.atomic charge - ANSWER 0 (# of protons - # of electrons)
,18.atomic weight - ANSWER larger number on periodic table (# of protons + #
of neutrons). Weighted average of mass numbers of the isotopes present in a
sample of the element. Decimal, round to nearest whole number to use.
19.Isotope - ANSWER different types of atoms of the same element (same #
protons and electrons, different numbers of neutrons)
20.False, they have different mass numbers - ANSWER True or False: Isotopes
have the same atomic number, charge, and mass
21.Ion - ANSWER a charged particle that forms when an atom gains or loses
one or more electrons. Resulting particle has fewer protons than electrons
(negative charge) or has more protons than electrons (positive charge)
22.Ionic charge - ANSWER # of protons - # of electrons = +n or -n
23.hepta - ANSWER seven
24.tetra - ANSWER four
25.binary ionic compounds - ANSWER 2 elements, metal + nonmetal
26.binary molecular compounds - ANSWER 2 elements, both nonmetals
27.non-binary ionic compounds - ANSWER 3+ elements, metal + polyatomic
group
28.binary acids - ANSWER hydrogen + nonmetal
, 29.non-binary acids - ANSWER hydrogen + polyatomic group
30.What is the one positively charged polyatomic group? What is it paired with?
- ANSWER ammonium, non-metal
31.What is the charge of all polyatomic groups containing chlorine? -
ANSWER -1
32.How many polyatomic groups containing chlorine are there? What are their
names? - ANSWER hypochlorite, chlorite, chlorate, perchlorate
33.Macroscopic domain - ANSWER large enough to be sensed directly by
human sight or touch
34.Microscopic domain - ANSWER objects too small to be sensed directly by
human sight or touch; visited in the imagination (or visible through
instruments like microscopes)
ex. atoms or molecules
35.Symbolic domain - ANSWER specialized language used to represent the
macroscopic & microscopic domain
ex. symbols, graphs, formulas, drawings, or equations
36.What are the 3 basic parts of a measurement? - ANSWER a number, a unit,
and indication of uncertainty
37.Exact numbers - ANSWER derived from counting
