Unit 6 - Writing Formulas And Naming Compounds
Questions to accompany the lesson of the same title.
Questions and Answers
- 1.
Binary compounds are composed of ___ atoms.
- A.
Two
- B.
One
- C.
Four
- D.
Many
Correct Answer
A. TwoExplanation
Binary compounds are composed of two atoms because the term "binary" refers to a compound that consists of two different elements. In a binary compound, there are two types of atoms present, which combine to form a chemical bond. This is in contrast to compounds with one, four, or many atoms, which do not fit the definition of a binary compound.Rate this question:
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- 2.
For an ion, the oxidation number is _______.
- A.
One less than the charge of the ion
- B.
The same as the charge of the ion
- C.
Zero
- D.
Always negative
Correct Answer
B. The same as the charge of the ionExplanation
The oxidation number of an ion is the same as the charge of the ion. This is because the oxidation number represents the electrical charge that an atom has gained or lost when forming an ion. Therefore, the oxidation number will always be equal to the charge of the ion.Rate this question:
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- 3.
A binary compound made with phosphorus will end with the word ______.
- A.
Phosphate
- B.
Phosphorus
- C.
Phosphite
- D.
Phosphide
Correct Answer
A. PhosphateExplanation
A binary compound made with phosphorus will end with the word "phosphate" because "phosphate" is the correct suffix for compounds that contain phosphorus. Phosphate is a polyatomic ion that consists of phosphorus and oxygen, and it is commonly found in many compounds such as calcium phosphate, sodium phosphate, and potassium phosphate. Therefore, when forming a binary compound with phosphorus, the resulting compound will end with the word "phosphate" to indicate the presence of the phosphate ion.Rate this question:
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- 4.
NO2 is the formula for _____.
- A.
Nitrogen oxygen
- B.
Noxide
- C.
Nitrogen oxate
- D.
Nitrous oxide
Correct Answer
D. Nitrous oxideExplanation
The correct answer is nitrous oxide. NO2 is the chemical formula for nitrous oxide, which is a colorless and sweet-smelling gas. It is commonly used as an anesthetic and in aerosol propellants. Nitrogen oxide (NOx) refers to a group of nitrogen and oxygen compounds, but specifically NO2 represents nitrous oxide. Nitrogen oxygen and nitrogen oxate are not correct because they do not accurately represent the chemical formula NO2.Rate this question:
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- 5.
A complex ion is _____.
- A.
An ion made from a large atom
- B.
A single atom that has formed an ion
- C.
Only found in compounds
- D.
An ion with more than one atom
Correct Answer
D. An ion with more than one atomExplanation
A complex ion refers to an ion that consists of multiple atoms bound together. It is different from a simple ion, which is composed of a single atom that has formed an ion. Complex ions are commonly found in compounds and can be formed through the coordination of a central metal atom or ion with surrounding ligands. These ligands can be neutral molecules or ions that donate a pair of electrons to the central atom, forming coordinate covalent bonds. Therefore, a complex ion is an ion with more than one atom.Rate this question:
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- 6.
Compounds that are hydrates contain what ingredient?
- A.
Nitrogen
- B.
Water
- C.
Hydrogen chloride
- D.
Chlorine
Correct Answer
B. WaterExplanation
Compounds that are hydrates contain water as an ingredient. Hydrates are compounds that have water molecules trapped within their crystal structure. These water molecules are called water of hydration. The presence of water in hydrates can affect their physical and chemical properties.Rate this question:
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- 7.
What is the difference between carbon monoxide and carbon dioxide?
- A.
Carbon dioxide has only one oxygen atom
- B.
Carbon monoxide has two carbon atoms
- C.
Carbon monoxide has only one oxygen atom
- D.
Carbon dioxide has two carbon atoms
Correct Answer
C. Carbon monoxide has only one oxygen atomExplanation
The difference between carbon monoxide and carbon dioxide lies in the number of oxygen atoms they contain. Carbon monoxide has only one oxygen atom, while carbon dioxide has two oxygen atoms.Rate this question:
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- 8.
A polyatomic ion is another name for a _____ ion.
- A.
Positive
- B.
Complex
- C.
Negative
- D.
Neutral
Correct Answer
B. ComplexExplanation
A polyatomic ion is a type of ion that is made up of two or more atoms bonded together and carries a net electric charge. These ions can either be positively charged or negatively charged, depending on the overall charge of the atoms within the ion. Therefore, the term "complex" accurately describes a polyatomic ion as it refers to the intricate structure and composition of these ions.Rate this question:
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