Radioactivity refers to the spontaneous emission of particles or radiation from the nucleus of an atom. The term “radioactive decay” refers to the process by which unstable atomic nuclei release energy in the form of radiation. This lesson will cover the basic concepts of radioactivity and radiation. What is Radioactivity? Radioactivity is the property of...

Chemical reactions are fundamental to chemistry, and they involve the transformation of one or more substances into new substances with different physical and chemical properties. In this lesson, we will explore the different types of chemical reactions and the factors that affect their rates. Types of Chemical Reactions: Synthesis reactions: These reactions involve the combination...

Chemical bonding refers to the attraction that holds atoms or ions together in a chemical compound. There are three types of chemical bonds: covalent bonds, ionic bonds, and metallic bonds. Covalent Bonding In a covalent bond, two atoms share electrons in order to achieve a stable electron configuration. This occurs most commonly between nonmetallic elements,...

Melting and boiling are two common processes that occur when substances change from one state of matter to another. These processes are related to the amount of energy that the particles of a substance have and how they move. The melting process Melting is the process by which a solid substance changes into a liquid...

Solids, liquids, and gases are the three states of matter that we commonly observe in our everyday lives. Understanding these states is essential to understanding the behavior of substances and their properties. In this lesson, we will explore the characteristics of solids, liquids, and gases, their physical properties, and how they transform from one state...

Isotopes are atoms of the same element with the same number of protons but different number of neutrons in the nucleus. Isotopes play a significant role in various fields such as nuclear physics, geology, biology, and chemistry. In this lesson, we will learn more about isotopes, how they are identified, and their significance. Atoms and...

Molecules are the basic building blocks of matter. They are formed when two or more atoms bond together. Molecules can be simple, such as the molecule of oxygen, which is made up of two oxygen atoms, or they can be complex, such as the molecule of DNA, which contains thousands of atoms. There are two...

The concept of the atom has been around since ancient times, but it wasn’t until the late 19th century that scientists began to understand the true nature of atoms. Today, we know that atoms are the basic building blocks of matter and that everything in the world is made up of atoms. In this lesson,...

The Periodic Table of Elements is a fundamental tool for understanding chemistry. It is a tabular arrangement of all the chemical elements in order of their atomic number, which is the number of protons in the nucleus of an atom of that element. This lesson will provide an overview of the Periodic Table, including its...