Chemical Compounds

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1. Hydrobromic acid

Explanation

hydro- and -ic indicate that H is attached to bromide (Br-) ion.

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Chemical Compound Quizzes & Trivia

Write the formula of the compound or give the name of the compound.

2.

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2. CO

Explanation

second element always gets a prefix

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3. CCl4

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4. Ionic compounds usually have an element that is a ? as the first element.

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5. KMnO4

Explanation

potassium is a metal so this is an ionic compound. Look up MnO4.

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6. Tetraphosphorus octoxide

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7. Ionic compounds have atoms that are attracted to each other due to opposite charges, these make up bonds called ? bonds.

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8. Tetraiodine nonachloride

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9. An ? is a substance made up of only one type of atom.

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10. NO

Explanation

Nitrogen is a nonmetal so a prefix must be used on the second element (no mono- on first element).

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11. SO3

Explanation

Since sulfur is a nonmetal, this is a molecular compound. If you said sulfite, that is an ion with a 2- charge. This formula did not show any charge.

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12. BaCrO4

Explanation

Since barium is a metal this is an ionic compound.

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13. Hydrocyanic acid

Explanation

hydro- and -ic indicate an -ide ending. Look up cyanide and it's charge.

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14. HCl

Explanation

It is an acid because of H in front, attached to chloride so hydro- in front and ending changes to -ic

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15. Disulfur decafluoride

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16. Phosphorus trihydride

Explanation

hydrogen has it's ending changed to ide so hydride.

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17. N2O4

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18. Iodine heptachloride

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19. NH4OH

Explanation

ionic compound so split it in half and name each polyatomic ion

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20. Diphosphorus pentoxide

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21. Aluminum nitrate

Explanation

You need parentheses around nitrate

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22. K2O

Explanation

potassium is a metal so this is an ionic compound

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23. Nitrogen triiodide

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24. The formula of an ionic compound gives the ? of the positive ions compared to the negative ions.

Explanation

For example, CaBr2 indicates that there are twice as many bromide ions present as calcium ions.

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25. Perchloric acid

Explanation

-ic indicates anion was perchlorate. Look up it's charge.

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26. H2Cr2O7

Explanation

H indicates an acid. Cr2O7 is called dichromate so ending is changed to -ic. It has a 2- charge so 2 hydrogen ions needed.

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27. Acetic acid

Explanation

Acetic tells you that the original ending of the anion was -ate. Look it up and find it's charge.

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28. Lead(II) chromate

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29. N2O

Explanation

molecular compound so use prefixes

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30. Sulfuric acid

Explanation

H has a + charge, sulfate has a 2- charge

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31. CaSO4

Explanation

ionic compound since calcium is a metal

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32. Molecular compounds are made of small, neutral groups of atoms called ?

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33. The atoms in a molecule are held together by shared electrons, and the bond is called a ? bond.

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34. Ionic compounds are electrically ? despite being composed of charged particles.

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35. Iron(III) oxide

Explanation

The roman numeral III indicates the charge of the iron ion.
Oxide has a 2- charge.

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36. Cl2O6

Explanation

no change to ending of first element, drop the -a on hexa- since oxide follows it.

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37. Sodium oxalate

Explanation

Na has a positive charge, oxalate has a 2- charge

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38. Nitrous acid

Explanation

-ous indicates anion ends in -ite, look up nitrite which has a negative one charge.

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39. H2CO3

Explanation

H in front means acid, carbonate has ending changed to -ic

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40. SF6

Explanation

molecular compound since sulfur is a nonmetal

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41. Chlorous acid

Explanation

-ous ending indicates -ite ending, look up chlorite and charge

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42. Acids are substances that increase the amount of ? ions present in a solution.

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43. phosphoric acid

Explanation

The -ic ending indicates you are working with phosphate ions, which have a charge of -3.

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44. Aluminum hydroxide

Explanation

You need parentheses around OH since it is polyatomic and more than one is required to balance the 3+ charge of aluminum.

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45. Oxalic acid

Explanation

Two hydrogen ions are needed for every oxalate ion (2-).

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46. The formula of a molecular compound tells you the actual composition of the ? which make it up.

Explanation

Molecular compounds are composed of tiny molecules. A formula of H20 indicates that there are 2 hydrogen atoms bonded to 1 oxygen atom in each water molecule.

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47. Cl7S4

Explanation

Don't change ending of first element! Only second element has ending changed to -ide.

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48. Magnesium phosphate

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49. PCl5

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50. A group of atoms with a charge is called a ? ion.

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Hydrobromic acid
CO
CCl4
Ionic compounds usually have an element that is a ? as the first...
KMnO4
Tetraphosphorus octoxide
Ionic compounds have atoms that are attracted to each other due to...
Tetraiodine nonachloride
An ? is a substance made up of only one type of atom.
NO
SO3
BaCrO4
Hydrocyanic acid
HCl
Disulfur decafluoride
Phosphorus trihydride
N2O4
Iodine heptachloride
NH4OH
Diphosphorus pentoxide
Aluminum nitrate
K2O
Nitrogen triiodide
The formula of an ionic compound gives the ? of the positive ions...
Perchloric acid
H2Cr2O7
Acetic acid
Lead(II) chromate
N2O
Sulfuric acid
CaSO4
Molecular compounds are made of small, neutral groups of atoms called...
The atoms in a molecule are held together by shared electrons, and the...
Ionic compounds are electrically ? despite being composed of charged...
Iron(III) oxide
Cl2O6
Sodium oxalate
Nitrous acid
H2CO3
SF6
Chlorous acid
Acids are substances that increase the amount of ? ions present in a...
Phosphoric acid
Aluminum hydroxide
Oxalic acid
The formula of a molecular compound tells you the actual composition...
Cl7S4
Magnesium phosphate
PCl5
A group of atoms with a charge is called a ? ion.
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