Difference Atom-Molecule-Compound Free Worksheet and Summary

 

The video explains the differences between atoms, molecules, and compounds:

An atom is the smallest unit of matter, made of protons (positively charged), neutrons (neutral), and electrons (negatively charged). Protons and neutrons are located in the nucleus, while electrons orbit around it. The atomic number is determined by the number of protons.

A molecule forms when atoms are chemically bonded, often by sharing electrons (covalent bonds). Molecules can be made of the same type of atoms (e.g., ozone) or different types (e.g., water: H₂O).

A compound is a type of molecule made from different elements bonded together chemically (e.g., sugar made from carbon, hydrogen, and oxygen).

Additionally, an element is a pure substance made up of only one type of atom and is listed on the periodic table.

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Difference between an Atom, a Molecule, and a Compound

Let’s learn the difference between an atom, molecule, and compound.

The smallest unit of matter is an atom.

Each atom is made of smaller particles known as subatomic particles.

In the nucleus, or middle of an atom are two subatomic particles the proton and neutron

The positively charged particles in the nucleus of an atom are called protons

The number of protons in the nucleus is the defining property of an element and is referred to as the atomic number.  

The uncharged particles in the nucleus are called neutrons.

Orbiting the nucleus of an atom is a cloud of negatively charged particles called electrons.

The electrons are much smaller in mass than protons and neutrons.

The mass of an atom is based on the sum of the mass of the protons and neutrons.

A molecule is when you take individual atoms and physically connect them together. The atoms are stuck together by either sharing the electrons which is a covalent bond or by transferring electrons which is an ionic bond. A molecule like ozone can be two or more of the same atom.

For example, when you stick two hydrogen atoms to one oxygen atom you get water.

In addition, you have compounds. A compound occurs when you combine elements together chemically, but for it to be a compound, those elements must be different.

An element is a pure substance consisting only of atoms that all have the same numbers of protons Chemical elements cannot be broken down into simpler substances by chemical means. You can find all of the elements on the Periodic Table of the Chemical Elements.

An example of a compound would be sugar. When you combine carbon, hydrogen, and oxygen you get sugar.

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