Atoms, Molecules, and Ions: Exercises

Test your knowledge in atoms, molecules and Ions
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Questions #: 20
Time: 10 minutes
Pass Score: 80.0%
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Which of these formulas represent molecules

Fe
PCl3
P4
Ar
POINTS (1)

Correct Answer

Explanation

Which of these formulas represent molecules?

I2
He
H2O
Al
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Correct Answer

Explanation

What is the difference between CO and Co?

  • (1) transparent refers to carbon monoxide, a molecule composed of one carbon and one oxygen atom.
  • (2) transparent refers to cobalt, a chemical element on the periodic table.
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CO
Co
POINTS (1)

Correct Answer

Explanation

What is the difference between

What is the difference between H2O and H2O2 (hydrogen peroxide)?

  • (1) transparent represents a molecule of water, consisting of two hydrogen atoms bonded to one oxygen atom.
  • (2) transparent (hydrogen peroxide) represents a molecule of hydrogen peroxide, consisting of two hydrogen atoms bonded to two oxygen atoms.
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H2O2
H2O
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Correct Answer

Explanation

Give the proper formula for each diatomic element

  1. (1) transparent Hydrogen
  2. (2) transparent Nitrogen
  3. (3) transparent Oxygen
  4. (4) transparent Fluorine 
  5. (5) transparent Chlorine
  6. (6) transparent Bromine
  7. (7) transparent Iodine
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N2
H2
O2
Cl2
F2
Br2
I2
POINTS (1)

Correct Answer

Explanation

In 1986, when Halley’s comet last passed the earth, astronomers detected the presence of S2 in their telescopes

Why is sulfur not considered a diatomic element?

Answer: while sulfur can form diatomic molecules like S2, it's not considered a diatomic element under standard Earth conditions because it's not the most stable form of sulfur in those conditions

POINTS (1)

Correct Answer

Explanation

What is the stem of fluorine used in molecule names?

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Explanation

What is the stem of selenium used in molecule names?

POINTS (1)

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Explanation

Give the proper name for each molecule

  1. PF3
  2. TeCl2
  3. N2O3
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tellurium dichloride
phosphorus trifluoride
dinitrogen trioxide
POINTS (1)

Correct Answer

Explanation

Give the proper name for each molecule

  1. NO
  2. CS2
  3. As2O3
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Arsenic Trioxide
Nitric Oxide
Carbon Disulfide
POINTS (1)

Correct Answer

Explanation

Give the proper name for each molecule

  1. XeF2
  2. O2F2
  3. SF6
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Xenon Difluoride
Sulfur Hexafluoride
Dioxygen Difluoride
POINTS (1)

Correct Answer

Explanation

Give the proper name for each molecule

  1. P4O10
  2. B2O3
  3. P2S3
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Diboron Trioxide
Tetraphosphorus Decoxide
ziphosphorus Trisulfide
POINTS (1)

Correct Answer

Explanation

Give the proper name for each molecule

  1. N2O
  2. N2O4
  3. N2O5
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Dinitrogen Pentoxide
Nitrous Oxide
Dinitrogen Tetroxide
POINTS (1)

Correct Answer

Explanation

Give the proper name for each molecule

  1. SeO2
  2. Cl2O
  3. XeF6
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Xenon Hexafluoride
Selenium Dioxide
Dichlorine Monoxide
POINTS (1)

Correct Answer

Explanation

Give the proper formula for each name

  1. (1) transparent Dinitrogen Pentoxide
  2. (2) transparent Tetraboron Tricarbide
  3. (3) transparent Phosphorus Pentachloride
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B4C
N2O5
PCl5
POINTS (1)

Correct Answer

Explanation

Give the proper formula for each name

  1. (1) transparent Nitrogen Triiodide
  2. (2) transparent Diarsenic Trisulfide
  3. (3) transparent Iodine Trichloride
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As2S3
NI3
ICl3
POINTS (1)

Correct Answer

Explanation

Give the proper formula for each name

  1. (1) transparent dioxygen dichloride
  2. (2) transparent dinitrogen trisulfide
  3. (3) transparent xenon tetrafluoride
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O2Cl2
XeF4
N2S3
POINTS (1)

Correct Answer

Explanation

Give the proper formula for each name

  1. (1) transparent Chlorine Dioxide
  2. (2) transparent Selenium Dibromide
  3. (3) transparent Dinitrogen Trioxide
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ClO2
N2O3
SeBr2
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Correct Answer

Explanation

Give the proper formula for each name

  1. (1) transparent Iodine Trifluoride
  2. (2) transparent Xenon Trioxide
  3. (3) transparent Disulfur Decafluoride
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XeO3
IF3
S2F10
POINTS (1)

Correct Answer

Explanation

Give the proper formula for each name

  1. (1) transparent Germanium Dioxide
  2. (2) transparent Carbon Disulfide
  3. (3) transparent Diselenium Dibromide
POINTS (1)

Correct Answer

Explanation

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sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC

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