Subatomic particles are the building blocks of matter. They are the smallest units of matter that can exist on their own. Subatomic particles are found in atoms, which are the basic units of matter.

There are three main types of subatomic particles:

1. Protons: Protons are positively charged particles. They are found in the nucleus of an atom, along with neutrons. Protons give atoms their atomic number, which is the number of protons in an atom.

2. Neutrons: Neutrons are neutral particles. They are also found in the nucleus of an atom. Neutrons add to the mass of an atom, but they do not affect its atomic number.

3. Electrons: Electrons are negatively charged particles. They orbit the nucleus of an atom. Electrons determine an atom's chemical properties.

Subatomic particles are very small. Protons and neutrons are about 10-15 meters in diameter. Electrons are even smaller, at about 10-18 meters in diameter.

Example of a subatomic particle

One example of a subatomic particle is the electron. Electrons are negatively charged particles that orbit the nucleus of an atom. Electrons are essential for chemical bonding, which is the process by which atoms bind to each other to form compounds.

Electrons can be removed from or added to atoms, which changes their chemical properties. This is why some elements are more reactive than others. For example, sodium is a very reactive element because it has one electron that can be easily removed. This means that sodium reacts easily with other elements to form compounds.