Final answer:
Elements are the simplest chemical substances that cannot be broken down into simpler substances. There are about 118 known elements, such as iron, carbon, and gold, which are categorized into metals and nonmetals. Each element has a unique chemical symbol and is listed on the periodic table.
Step-by-step explanation:
What is an Element?
An element is the simplest type of chemical substance and cannot be broken down into simpler substances by ordinary chemical means. With about 118 elements recognized by science, they each possess unique physical and chemical properties. Examples of elements include iron (Fe), carbon (C), and gold (Au).
Types of Elements
The periodic table showcases the known elements, categorizing them primarily into metals and nonmetals. Metals like iron and copper are shiny and effective conductors of electricity and heat. Nonmetals, which are fewer in number, include elements like hydrogen and oxygen, and they lack metallic properties. An essential nonmetal for life is carbon.
Periodic Table and Chemical Symbols
All elements are listed on the periodic table, and each has its own unique chemical symbol. Some additional chemical symbols for e