Questions and Answers
What is the defining characteristic of a molecule of a compound?
It consists of more than one kind of atoms
What is the composition of a molecule of an element?
It consists of atoms of the same kind
How are the atoms of different elements in the molecule of a compound combined?
In a definite ratio
Which of the following is an example of a man-made compound?
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What is the most common composition of compounds on Earth?
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What is the classification of ammonia as a molecule?
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How is water classified based on the combination of different elements?
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What is the classification of carbon dioxide based on the combination of different elements?
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How is ethanol classified based on the combination of different elements?
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What is the most obvious difference between an element and a compound?
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Study Notes
Characteristics of Molecules
- The defining characteristic of a molecule of a compound is the combination of two or more different elements.
- The composition of a molecule of an element, on the other hand, consists of only one type of element.
Combination of Atoms
- Atoms of different elements in the molecule of a compound are combined through chemical bonds.
Examples of Compounds
- Nylon is an example of a man-made compound.
- Water (H2O) is a natural compound with a combination of hydrogen and oxygen elements.
- Ammonia (NH3) is a compound classified as a nitrogen-hydrogen molecule.
- Carbon dioxide (CO2) is a compound classified as a carbon-oxygen molecule.
- Ethanol (C2H5OH) is a compound classified as a carbon-hydrogen-oxygen molecule.
Difference between Elements and Compounds
- The most obvious difference between an element and a compound is that an element consists of only one type of atom, whereas a compound consists of two or more different elements.
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