Identifying Compounds- Distinguishing Elements from which of the Following Substances
Which of the following is a compound? This question often arises in the field of chemistry, where understanding the difference between elements, compounds, and mixtures is crucial. In this article, we will explore the characteristics of compounds and provide examples to help you identify one from the given options.
A compound is a substance formed by the chemical combination of two or more elements in fixed proportions. Unlike elements, which are pure substances made up of only one type of atom, compounds consist of different types of atoms bonded together. These bonds can be ionic, covalent, or metallic, depending on the elements involved.
Let’s examine some examples to better understand compounds:
1. Water (H2O): This is a compound composed of two hydrogen atoms and one oxygen atom. The covalent bond between these atoms holds the compound together.
2. Sodium chloride (NaCl): This is an ionic compound formed by the transfer of electrons between sodium and chlorine atoms. The resulting lattice structure is held together by electrostatic forces.
3. Carbon dioxide (CO2): This is a covalent compound made up of one carbon atom and two oxygen atoms. The double bonds between the atoms give carbon dioxide its linear molecular structure.
Now, let’s address the question again: Which of the following is a compound? To answer this, we need to identify the substance that meets the criteria of a compound. Based on the definitions and examples provided, we can determine which option is a compound.
For instance, if the options are:
A) Oxygen (O2)
B) Sugar (C12H22O11)
C) Iron (Fe)
D) Saltwater (a mixture of salt and water)
The correct answer would be B) Sugar. Sugar is a compound because it is formed by the chemical combination of carbon, hydrogen, and oxygen atoms in a fixed ratio. Oxygen (O2) and iron (Fe) are elements, while saltwater is a mixture of salt and water, not a compound.
In conclusion, a compound is a substance formed by the chemical combination of two or more elements in fixed proportions. By understanding the characteristics of compounds and examining examples, you can easily identify which of the given options is a compound.
