Learn: Atoms, Elements and Compounds

Welcome!Today we'll learn about atoms, elements, and compounds. These are the building blocks of chemistry, and they help us understand how substances are made and interact.

What are atoms?An atom is the smallest particle of an element that retains its properties. Atoms consist of three subatomic particles: protons, neutrons, and electrons. Protons and neutrons form the nucleus, while electrons orbit around it.

What are elements?An element is a substance made up of only one type of atom. For example, oxygen is an element because it contains only oxygen atoms. Elements are organised in the periodic table based on their properties.

What are compounds?A compound is a substance made when two or more elements chemically combine in fixed proportions. For example, water (H2O) is a compound made of hydrogen and oxygen atoms bonded together.

How are compounds formed?Compounds are formed through chemical reactions, where elements combine by transferring or sharing electrons. For example, in ionic bonding, electrons are transferred, while in covalent bonding, electrons are shared.

Why are atoms important?Atoms are important because they form everything around us, from the air we breathe to the materials we use. Understanding atoms allows scientists to predict how substances will behave and create new materials.

Review Time!Great work! You've learned about atoms, elements, and compounds. Now let's test your understanding with a few questions.