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Questions and Answers
What is a binary compound?
What is a binary compound?
- A compound made up of three elements
- A compound that cannot be chemically combined
- A compound made of more than two elements
- A compound made up of two elements (correct)
What is a compound?
What is a compound?
Two or more elements that have chemically combined
What is the law of definite proportions?
What is the law of definite proportions?
The principle that a compound always contains exactly the same elements in exactly the same proportions by mass
What is a molecule?
What is a molecule?
What does a subscript in a chemical formula indicate?
What does a subscript in a chemical formula indicate?
The formula for table salt is NaCl. According to the law of definite proportions, this means that the formula for table salt _____
The formula for table salt is NaCl. According to the law of definite proportions, this means that the formula for table salt _____
Which part of an atom is actively exchanged or shared in a chemical bond?
Which part of an atom is actively exchanged or shared in a chemical bond?
Pure gold is a(n) _____.
Pure gold is a(n) _____.
Pure water is a(n) _____.
Pure water is a(n) _____.
The smallest unit into which a compound can be divided and still be that same compound is a(n) _____.
The smallest unit into which a compound can be divided and still be that same compound is a(n) _____.
How many atoms are in one molecule of rust (Fe2O3)?
How many atoms are in one molecule of rust (Fe2O3)?
Which of the following would be the best name for MgCl2?
Which of the following would be the best name for MgCl2?
Which of the following is the best name for N2O?
Which of the following is the best name for N2O?
From what class(es) of elements is copper(I) chloride made?
From what class(es) of elements is copper(I) chloride made?
From what class(es) of elements is nitrogen dioxide made?
From what class(es) of elements is nitrogen dioxide made?
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Study Notes
Compounds and Their Definitions
- Binary compounds consist of two elements.
- A compound is formed from two or more elements that chemically combine.
- The law of definite proportions states that a compound always contains the same elements in the same mass proportions.
Molecular Structure and Components
- A molecule is the smallest unit of a compound that retains its chemical properties.
- The subscript in a chemical formula indicates the number of atoms of the preceding element in the compound.
Examples and Applications
- The formula for table salt is NaCl, which exemplifies the law of definite proportions as it is always NaCl.
- Electrons are the subatomic particles involved in chemical bonding, as they are exchanged or shared during interactions.
- Pure gold is categorized as an element, whereas pure water is classified as a compound.
Identifying Atoms and Compounds
- A molecule of rust (Fe2O3) contains five atoms.
- MgCl2 is correctly named magnesium chloride.
- The compound N2O is best referred to as dinitrogen monoxide.
Composition of Specific Compounds
- Copper I chloride is composed of a metal and a nonmetal.
- Nitrogen dioxide consists of two nonmetals.
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