Example of a Chemical Change:
When iron rusts, it reacts with oxygen in the presence of moisture to form iron oxide (rust). This process is a chemical change because it results in a new substance with different properties.
Example of a Physical Change:
Melting ice into water is a physical change. The ice (solid state of water) changes to liquid water when heated, but the chemical composition of the substance remains the same (H₂O).
What is the Periodic Table For?
The periodic table is a systematic arrangement of chemical elements, organized by increasing atomic number. It provides important information about the elements, such as their symbols, atomic numbers, and electron configurations. The periodic table helps predict the properties of elements, their relationships to one another, and their likely chemical behaviors, making it a fundamental tool in chemistry and related sciences.
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