Answer:
An element contains just one type of atom.
A compound contains two or more different atoms joined together.
A mixture contains two or more different substances that are only physically joined together, not chemically.
A mixture can contain both elements and compounds.
Step-by-step explanation:
Elements and compounds are both types of substances. Elements are made up of only one type of atom, while compounds are made up of two or more different types of atoms that are chemically bonded together. To classify elements from compounds, we can look at their compositions.
For example, let's consider the compound water (H2O). Water is made up of two different types of atoms: hydrogen (H) and oxygen (O). Since water consists of multiple types of atoms, it is classified as a compound.
On the other hand, let's look at the element chlorine (Cl). Chlorine is composed of only one type of atom, which is chlorine itself. Therefore, chlorine is considered an element.
In summary, if a substance consists of multiple types of atoms, it is classified as a compound. If a substance consists of only one type of atom, it is classified as an element.
In chemistry, elements and compounds are two different types of substances.
1. Elements: An element is a pure substance that consists of only one type of atom. Atoms are the basic building blocks of matter. Elements are represented by symbols on the periodic table, such as hydrogen (H), oxygen (O), and chlorine (Cl). Each element has unique properties and characteristics.
2. Compounds: A compound is a substance that is formed when two or more different types of elements combine chemically in fixed proportions. Compounds have a distinct chemical formula and are represented by a combination of symbols and subscripts. For example, water (H2O) is a compound made up of two hydrogen atoms and one oxygen atom.
Now, let's look at the examples given in the answer:
- Chlorine (Cl2): Chlorine exists as a diatomic molecule, meaning it is made up of two chlorine atoms bonded together. Even though it is composed of the same type of atom (chlorine), it is still considered an element because it consists of only one type of atom.
- Water (H2O): Water is a compound because it is composed of two different types of atoms - hydrogen and oxygen. The chemical formula H2O indicates that there are two hydrogen atoms and one oxygen atom in each water molecule.
In summary, elements are pure substances made up of only one type of atom, while compounds are substances formed by the combination of two or more different types of elements.