WGUl D425l Objectivel Assessmentl (Latestl
2026/l 2027l Update)l Introductionl tol
Chemistry|l 100%l Verifiedl Questionsl &l
Answersl |l Gradel A
Q:l Wherel isl thel majorityl ofl thel atomicl massl concentrationl inl anl atom?
A-l orbitals
B-l nucleus
C-l shells
D-l subshells
Answer:
Nucleus
Q:l Thel followingl notationl representsl anl atoml inl itsl neutrall statel
14
7l N
Howl manyl protons,l neutrons,l andl electronsl doesl thisl elementl have.
A-l protonsl 7,l neutronsl 14,l electronsl 7
B-l protonsl 7,l neutronsl 7,l electronsl 7
C-l protonsl 14,l neutronsl 7,l electronsl 7
D-l protonsl 7,l neutronsl 7,l electronsl 10
Answer:
Protonsl 7,l neutronsl 7,l electronsl 7
Q:l Neonl (Ne)l hasl threel stablel isotopes:l 90.5%l ofl neon-20l (19.992l amu),l 0.270%l ofl
neon-21l (20.994l amu),l andl 9.25%l ofl neon-22l (21.991l amu).l Whatl isl thel averagel
atomicl massl ofl neon?l
,A-l 20.18l amu
B-l 20.2l amu
C-l 20.99l amu
D-l 21.0l amu
Answer:
20.18l amu
Q:l Naturallyl occurringl sulfurl (S)l isl composedl ofl 95.02%l ofl silver-32l (31.972l amu),l
0.7500%l ofl sulfur-33l (32.971l amu),l 4.210%l ofl sulfur-34l (33.969l amu),l andl 0.02000%l
sulfur-36l (35.967l amu).l Whatl isl thel averagel atomicl massl ofl sulfur?
A-l 32.06l amu
B-l 32.064l amu
C-l 33.72l amu
D-l 33.720l amu
Answer:
32.064l amu
Q:l Naturallyl occurringl galliuml (Ga)l isl composedl ofl 60.11%l ofl gallium-69l
(68.926amu),l andl 39.89%l ofl gallium-71l (70.925l amu).l Whatl isl thel averagel atomicl
massl ofl gallium?
A-l 69.64l amu
B-l 69.7l amu
C-l 69.72l amu
D-l 69.9l amu
Answer:
69.72l amu
Q:l Considerl thel followingl imagel
<——————
Whatl isl thel relationshipl betweenl atomicl numberl andl atomicl radius.
,A-l theyl arel exponentiallyl related
B-l theyl arel notl related
C-l theyl arel directlyl related
D-l theyl arel inverselyl related
Answer:
Theyl arel inverselyl related
Q:l Thel followingl graphl showsl
l/
l/
l/
l/
Whatl isl thel relationshipl betweenl electrol negativityl andl ionizationl energy
A-l theyl arel exponentiallyl relatedl
B-l theyl arel inverselyl relatedl
C-l theyl arel notl relatedl
D-l theyl arel directlyl related
Answer:
Theyl arel directlyl related
Q:l Reviewl thel graphl
______________
——————
Howl arel atomicl numberl andl electrol negativityl related.
A-l inversely
B-l directly
C-l nol relationship
D-l exponentally
Answer:
Directly
, Q:l Whichl typel ofl reactionl breaksl al compoundl intol twol orl morel simplerl substances?
A-l synthesis
B-l decomposition
C-l singlel replacement
D-l combination
Answer:
Decomposition
Q:l Inl thel followingl balancedl chemicall equationl twol unitsl ofl iron(III)l hydroxidel yieldl
onel unitl ofl ironl (III)l oxidel andl threel unitsl ofl waterl vaporl
2Fe(OH)3l —->l Fe2O3l +l 3H2O(g)
Whichl typel ofl reactionl doesl thisl equationl represent.
A-l decomposition
B-l doublel replacement
C-l synthesis
D-l combination
Answer:
Decomposition
Q:l Whichl periodl 2l elementl formsl al monoatomicl ionl withl al chargel ofl -3?
A-l O
B-l N
C-l C
D-l F
Answer:
N
2026/l 2027l Update)l Introductionl tol
Chemistry|l 100%l Verifiedl Questionsl &l
Answersl |l Gradel A
Q:l Wherel isl thel majorityl ofl thel atomicl massl concentrationl inl anl atom?
A-l orbitals
B-l nucleus
C-l shells
D-l subshells
Answer:
Nucleus
Q:l Thel followingl notationl representsl anl atoml inl itsl neutrall statel
14
7l N
Howl manyl protons,l neutrons,l andl electronsl doesl thisl elementl have.
A-l protonsl 7,l neutronsl 14,l electronsl 7
B-l protonsl 7,l neutronsl 7,l electronsl 7
C-l protonsl 14,l neutronsl 7,l electronsl 7
D-l protonsl 7,l neutronsl 7,l electronsl 10
Answer:
Protonsl 7,l neutronsl 7,l electronsl 7
Q:l Neonl (Ne)l hasl threel stablel isotopes:l 90.5%l ofl neon-20l (19.992l amu),l 0.270%l ofl
neon-21l (20.994l amu),l andl 9.25%l ofl neon-22l (21.991l amu).l Whatl isl thel averagel
atomicl massl ofl neon?l
,A-l 20.18l amu
B-l 20.2l amu
C-l 20.99l amu
D-l 21.0l amu
Answer:
20.18l amu
Q:l Naturallyl occurringl sulfurl (S)l isl composedl ofl 95.02%l ofl silver-32l (31.972l amu),l
0.7500%l ofl sulfur-33l (32.971l amu),l 4.210%l ofl sulfur-34l (33.969l amu),l andl 0.02000%l
sulfur-36l (35.967l amu).l Whatl isl thel averagel atomicl massl ofl sulfur?
A-l 32.06l amu
B-l 32.064l amu
C-l 33.72l amu
D-l 33.720l amu
Answer:
32.064l amu
Q:l Naturallyl occurringl galliuml (Ga)l isl composedl ofl 60.11%l ofl gallium-69l
(68.926amu),l andl 39.89%l ofl gallium-71l (70.925l amu).l Whatl isl thel averagel atomicl
massl ofl gallium?
A-l 69.64l amu
B-l 69.7l amu
C-l 69.72l amu
D-l 69.9l amu
Answer:
69.72l amu
Q:l Considerl thel followingl imagel
<——————
Whatl isl thel relationshipl betweenl atomicl numberl andl atomicl radius.
,A-l theyl arel exponentiallyl related
B-l theyl arel notl related
C-l theyl arel directlyl related
D-l theyl arel inverselyl related
Answer:
Theyl arel inverselyl related
Q:l Thel followingl graphl showsl
l/
l/
l/
l/
Whatl isl thel relationshipl betweenl electrol negativityl andl ionizationl energy
A-l theyl arel exponentiallyl relatedl
B-l theyl arel inverselyl relatedl
C-l theyl arel notl relatedl
D-l theyl arel directlyl related
Answer:
Theyl arel directlyl related
Q:l Reviewl thel graphl
______________
——————
Howl arel atomicl numberl andl electrol negativityl related.
A-l inversely
B-l directly
C-l nol relationship
D-l exponentally
Answer:
Directly
, Q:l Whichl typel ofl reactionl breaksl al compoundl intol twol orl morel simplerl substances?
A-l synthesis
B-l decomposition
C-l singlel replacement
D-l combination
Answer:
Decomposition
Q:l Inl thel followingl balancedl chemicall equationl twol unitsl ofl iron(III)l hydroxidel yieldl
onel unitl ofl ironl (III)l oxidel andl threel unitsl ofl waterl vaporl
2Fe(OH)3l —->l Fe2O3l +l 3H2O(g)
Whichl typel ofl reactionl doesl thisl equationl represent.
A-l decomposition
B-l doublel replacement
C-l synthesis
D-l combination
Answer:
Decomposition
Q:l Whichl periodl 2l elementl formsl al monoatomicl ionl withl al chargel ofl -3?
A-l O
B-l N
C-l C
D-l F
Answer:
N
