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if elements and compounds are both pure substances, then what is the difference between them?
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Sagot :

jafif67556

Answer:

### Elements:

1. Definition: An element is a substance that consists of only one type of atom.

2. Simplest Form: Elements cannot be broken down into simpler substances by chemical means.

3. Atomic Number: Each element is characterized by its unique number of protons in its nucleus, known as its atomic number.

4. Periodic Table: Elements are listed on the periodic table, e.g., Hydrogen (H), Oxygen (O), Gold (Au), etc.

### Compounds:

1. Definition: A compound is a substance that consists of two or more different types of atoms chemically bonded together.

2. Fixed Ratio: Compounds have a fixed ratio of elements. For example, water (H² O) always has two hydrogen atoms for every oxygen atom.

3. Chemical Means: Compounds can be broken down into their constituent elements by chemical reactions, such as electrolysis for water.

4. Properties: The properties of a compound are usually different from the properties of its constituent elements. For example, sodium (a reactive metal) and chlorine (a toxic gas) combine to form table salt (NaCl), which is safe to eat.

### Key Differences:

  • Composition: Elements contain only one kind of atom, while compounds consist of two or more types of atoms chemically combined.

  • Decomposition: Elements cannot be broken down into simpler substances by chemical reactions, whereas compounds can be decomposed into simpler substances (their constituent elements).

  • Properties: The physical and chemical properties of an element are unique to that element, while the properties of a compound differ from those of the elements that make it up.

### Example:

Element: Oxygen (O² ) — A gas essential for respiration.

Compound: Water (H² O ) — A liquid formed by hydrogen and oxygen that is essential for life.

Galaxxieyy

Answer:

Even though elements and compounds are both pure substances, they differ in their makeup.

Elements are made of only one kind of atom and can't be broken down into simpler substances by chemical means.

Examples of elements are:

  • hydrogen,
  • oxygen,
  • and gold.

Compounds, however, are made of two or more different kinds of atoms that are chemically bonded together. These can be broken down into simpler substances (their elements) through chemical reactions. For instance, water (H2O) is made of hydrogen and oxygen, and table salt (NaCl) is made of sodium and chlorine.

In short, elements are the simplest forms of matter, while compounds are made up of elements.

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