Look at the materials listed in the word bank. Tell whether the materials are elements or compounds. Write the materials under the proper columns.
Word Bank:
Silver
Copper
Hair spray
Mist
Water
Iron
Rust
Whipped cream
Rubbing alcohol
Antiseptic solution
| Pure Substances | Mixtures |
|---|---|
| Element | Compound | Homogeneous | Heterogeneous |
| | | | |
Answer (2)
Elements are the simplest substances and cannot be broken down into simpler substances. Silver, copper, and iron are metals composed of only one type of atom, which makes them elements.
Compounds consist of two or more elements chemically combined. Water and rust are examples of compounds. Water is formed by hydrogen and oxygen, while rust typically results from the chemical reaction between iron and oxygen.
Homogeneous mixtures have a uniform composition, which means the components are evenly distributed. Rubbing alcohol and antiseptic solutions are examples, as they often appear as a single phase or uniform appearance.
Heterogeneous mixtures have visibly different components or phases. Hair spray, mist, and whipped cream have varying components that are often distinguishable or can separate over time.
By understanding these categories, one can better comprehend the classification of materials based on their properties and composition.
The materials were categorized into elements, compounds, and mixtures based on their properties. Silver, copper, and iron are elements; water and rust are compounds; and rubbing alcohol and antiseptic solutions are homogeneous mixtures while hair spray, mist, and whipped cream are heterogeneous mixtures. This classification helps clarify the nature of these substances in chemistry.
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