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Chemical element

Adapted from Wikipedia · Explorer experience

A detailed 32-column periodic table showing elements and their groups, useful for learning chemistry.

What Are Chemical Elements?

Chemical elements are like the building blocks of everything around us. Imagine you have a big box of colorful LEGO pieces. Each piece is different, but when you put them together, you can build many things. Elements are similar — they are tiny parts that make up all matter.

Every element has a special number called an atomic number. This number tells us how many tiny parts called protons are in the center of an atom, called the nucleus. For example, oxygen has 8 protons, so its atomic number is 8. All oxygen atoms have exactly 8 protons.

The Periodic Table

Scientists use a chart called the periodic table to organize elements. It’s like a big grid that shows elements and their properties. Dmitri Mendeleev, a smart scientist from Russia, created the first periodic table in 1869. He arranged elements by their atomic numbers and noticed patterns. This helped scientists predict how elements would behave.

The periodic table has over 100 squares, each representing one element. Some common elements include hydrogen, carbon, oxygen, and gold. Each element has a short symbol, like “O” for oxygen, to make it easy to write and share ideas.

Where Do Elements Come From?

Most elements were made inside stars, where they glow and burn for millions of years. The simplest elements, hydrogen and helium, were formed just after the Big Bang. Heavier elements, like iron, are made when stars explode or bump into each other.

On Earth, we find many elements in nature. For example, carbon is in coal and diamonds, sulfur is in volcanoes, and copper is used to make wires. Some elements are made in labs by scientists to learn more about them.

Fun Facts About Elements

  • Oxygen gives us the air we breathe. Every breath you take has oxygen atoms.
  • Gold is shiny and does not rust. People have used it for jewelry for thousands of years.
  • Hydrogen is the lightest element and can be used as fuel for rockets.

Elements are everywhere — in the air, water, food, and even in your body! They help make the world work and are important for life.

Images

A sample of elemental gold, a rare and valuable metal known for its rich, yellow color and its importance in jewelry and industry.
A colorful periodic table showing how many stable isotopes each element has.
Scientific illustration showing different shapes of electron orbitals in atoms, helping to visualize atomic structure.
A colorful periodic table showing different metal elements - perfect for learning about chemistry!
Illustration showing different natural forms of carbon, such as graphite and diamond.
Map showing where chemical elements are named after places on Earth and objects in our Solar System.
Historic chart showing early atomic symbols and weights by scientist John Dalton.
A colorful chart showing what the universe is made of, including dark matter, dark energy, and normal matter, as studied by NASA.
Portrait of Robert Boyle, a famous scientist from the 18th century, surrounded by scientific instruments and tools.
Title page of 'The Sceptical Chymist' by Robert Boyle, a famous science book from 1661.
Portrait of Dmitri Mendeleev, the famous Russian chemist who created the periodic table of elements.

This article is a child-friendly adaptation of the Wikipedia article on Chemical element, available under CC BY-SA 4.0.

Images from Wikimedia Commons. Tap any image to view credits and license.