Chem 1020 Final Exam Questions with
Guaranteed Pass Solutions 2025-2026
Updated.
Which of the following statements is true?
a: Elements, but not compounds, are pure substances
b: Compounds, but not elements: are pure substances
c: Both elements & compounds are pure substances - Answer b: Compounds, but not
elements: are pure substances
A pure substance F is found to change upon heating into two new pure substances M & Y. Both
M & Y may be decomposed by chemical means. We can conclude that:
a: F is an element, M & Y are compounds
b: F is a compound, M & Y are elements
c: All are elements
d: All are compounds - Answer d: All are compounds
Isotopes of a given element:
a: Same mass # but different # of protons
b: Different mass # but identical # of protons
c: Same atomic # but different chemical properties
d: Same mass # but different chemical properties - Answer b: Different mass # but identical #
of protons
The quantity "A+Z" gives the number of:
a: Electrons in an atom
b: Neutrons in an atomic nucleus
c: Nucleons in an atomic nucleus
d: All subatomic particles in an atom - Answer d: All subatomic particles in an atom
Write the complete electron configuration of Oxygen - Answer 1s2 2s2 2p4
Write the valence electron configuration of Sulfur - Answer 3s2 3p4
Write the orbital diagram for Nitrogen - Answer /\\/ /\\/ /\/\/\
,1s 2s 2p
Group IA is called, how many valence electrons? - Answer Alkali Metals, 1
Group IIA is called, how many valence electrons? - Answer Alkali Earths, 2
Group VIIA is called, how many valence electrons? - Answer Halogens, 7
Group VIIIA is called, how many valence electrons? - Answer Noble Gases, 8
Convert 80.0km into cm - Answer 80.0km x 100000cm/1km = 8.0 x 10^7
Convert 80.0m into km - Answer 80.0cm x 1km/1000m = 8.0 x 10^-2
Convert 2.0 hours into seconds - Answer 2.0hrs x 3600secs/1hr = 7200 seconds
Convert 20000 seconds into hours - Answer 20000 x 1hr/3600secs = 5.56 hours
Convert 2.5 m/s into km/hr - Answer 2.5m/s x 1km/1000m x 3600/1hr = 9km/hr
What volume (in cm3) of gold is needed to have a mass of 22.8g? The density of gold is 10.5
g/cm3. - Answer 22.8g / 10.5g/cm = 2.17g/cm
What is the density of a liquid if a 10.0g sample has a volume of 10.9mL. Identify the substance
(using the table of densities). - Answer 10.0g/10.9mL = 0.917 (Olive Oil)
There is a temperature of 25 degrees Celsius.
What would it be in Fahrenheit? - Answer (25 x 9/5) + 32 = 77F
There is a temperature of 25 degrees Celsius.
What would it be in Kelvin? - Answer 25 + 273 = 298 Kelvin
Which has similar properties? (MORE THAN ONE)
a: 1s2 2s1 & 1s2 2s2
b: 1s2 2s2 2p6 & 1s2 2s2 2p6 3s2 3p6
, c: 1s2 2s2 2p3 & 1s2 2s2 2p6 3s2 3p6 4s2 3d3
d: 1s2 2s2 2p6 3s2 3p4 & 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 - Answer b: 1s2 2s2 2p6 & 1s2
2s2 2p6 3s2 3p6
d: 1s2 2s2 2p6 3s2 3p4 & 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
How many electrons appear in the Lewis symbol for an element whose electron configuration is
1s2 2s2 2p6? - Answer 6 electrons
How many total electrons are present in an N3- ion? - Answer 10 electrons
Selenium & Potassium form. What's the equation if the charge be neutral? - Answer K2Se
Which of the following is a coordinate covalent bond?
a: H-C=N
b: O=C=O
c: N---N
d: N---N-O - Answer d: N---N-O
Which bonds polarity is incorrect?
a: +->
H-F
b: +->
K-O
c: +->
Mg-H
d: +->
Cl-I - Answer d: +->
Cl-I
Name the seven diatomic molecules - Answer H2
N2
F2
O2
I2
Cl2
Guaranteed Pass Solutions 2025-2026
Updated.
Which of the following statements is true?
a: Elements, but not compounds, are pure substances
b: Compounds, but not elements: are pure substances
c: Both elements & compounds are pure substances - Answer b: Compounds, but not
elements: are pure substances
A pure substance F is found to change upon heating into two new pure substances M & Y. Both
M & Y may be decomposed by chemical means. We can conclude that:
a: F is an element, M & Y are compounds
b: F is a compound, M & Y are elements
c: All are elements
d: All are compounds - Answer d: All are compounds
Isotopes of a given element:
a: Same mass # but different # of protons
b: Different mass # but identical # of protons
c: Same atomic # but different chemical properties
d: Same mass # but different chemical properties - Answer b: Different mass # but identical #
of protons
The quantity "A+Z" gives the number of:
a: Electrons in an atom
b: Neutrons in an atomic nucleus
c: Nucleons in an atomic nucleus
d: All subatomic particles in an atom - Answer d: All subatomic particles in an atom
Write the complete electron configuration of Oxygen - Answer 1s2 2s2 2p4
Write the valence electron configuration of Sulfur - Answer 3s2 3p4
Write the orbital diagram for Nitrogen - Answer /\\/ /\\/ /\/\/\
,1s 2s 2p
Group IA is called, how many valence electrons? - Answer Alkali Metals, 1
Group IIA is called, how many valence electrons? - Answer Alkali Earths, 2
Group VIIA is called, how many valence electrons? - Answer Halogens, 7
Group VIIIA is called, how many valence electrons? - Answer Noble Gases, 8
Convert 80.0km into cm - Answer 80.0km x 100000cm/1km = 8.0 x 10^7
Convert 80.0m into km - Answer 80.0cm x 1km/1000m = 8.0 x 10^-2
Convert 2.0 hours into seconds - Answer 2.0hrs x 3600secs/1hr = 7200 seconds
Convert 20000 seconds into hours - Answer 20000 x 1hr/3600secs = 5.56 hours
Convert 2.5 m/s into km/hr - Answer 2.5m/s x 1km/1000m x 3600/1hr = 9km/hr
What volume (in cm3) of gold is needed to have a mass of 22.8g? The density of gold is 10.5
g/cm3. - Answer 22.8g / 10.5g/cm = 2.17g/cm
What is the density of a liquid if a 10.0g sample has a volume of 10.9mL. Identify the substance
(using the table of densities). - Answer 10.0g/10.9mL = 0.917 (Olive Oil)
There is a temperature of 25 degrees Celsius.
What would it be in Fahrenheit? - Answer (25 x 9/5) + 32 = 77F
There is a temperature of 25 degrees Celsius.
What would it be in Kelvin? - Answer 25 + 273 = 298 Kelvin
Which has similar properties? (MORE THAN ONE)
a: 1s2 2s1 & 1s2 2s2
b: 1s2 2s2 2p6 & 1s2 2s2 2p6 3s2 3p6
, c: 1s2 2s2 2p3 & 1s2 2s2 2p6 3s2 3p6 4s2 3d3
d: 1s2 2s2 2p6 3s2 3p4 & 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 - Answer b: 1s2 2s2 2p6 & 1s2
2s2 2p6 3s2 3p6
d: 1s2 2s2 2p6 3s2 3p4 & 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
How many electrons appear in the Lewis symbol for an element whose electron configuration is
1s2 2s2 2p6? - Answer 6 electrons
How many total electrons are present in an N3- ion? - Answer 10 electrons
Selenium & Potassium form. What's the equation if the charge be neutral? - Answer K2Se
Which of the following is a coordinate covalent bond?
a: H-C=N
b: O=C=O
c: N---N
d: N---N-O - Answer d: N---N-O
Which bonds polarity is incorrect?
a: +->
H-F
b: +->
K-O
c: +->
Mg-H
d: +->
Cl-I - Answer d: +->
Cl-I
Name the seven diatomic molecules - Answer H2
N2
F2
O2
I2
Cl2
