Difference between molecules and compounds

In summary, a molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. Water (H2O), carbon dioxide (CO2), and methane (CH4) are all compounds because they are made up of more than one element. However, molecular hydrogen (H2), molecular oxygen (O2), and molecular nitrogen (N2) are not compounds because they are composed of a single element.
  • #1
chemister
21
0
When classifying as to whether an atom, molecule, element, or compoud, what would the following be?

-H20
-H2
-C6H12O6 (glucose)
-N2

I guess i am kind of confused as to the difference between molecules and compounds. I thought water was a molecule, but according to the definition of a compound which says two or more kinds of atoms chemically combined would water be a compound? Is this the same with glucose?

Thanks for helping a confused person! :smile:
 
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  • #2
What is the difference between a compound and a molecule?

A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds.

Molecular hydrogen (H2), molecular oxygen (O2) and molecular nitrogen (N2) are not compounds because each is composed of a single element. Water (H2O), carbon dioxide (CO2) and methane (CH4) are compounds because each is made from more than one element. The smallest bit of each of these substances would be referred to as a molecule. For example, a single molecule of molecular hydrogen is made from two atoms of hydrogen while a single molecule of water is made from two atoms of hydrogen and one atom of oxygen.
 
  • #3
Thanks for your help! That clears things up a lot :smile:
 

FAQ: Difference between molecules and compounds

What is the difference between molecules and compounds?

Molecules and compounds are both made up of atoms, but they differ in their composition. A molecule is the smallest unit of a substance that retains its chemical properties, while a compound is a substance made up of two or more different types of atoms bonded together.

How are molecules and compounds formed?

Molecules are formed through the sharing of electrons between atoms, which creates chemical bonds. Compounds are formed when two or more different types of atoms bond together to create a new substance with its own unique properties.

Can a molecule be a compound?

Yes, a molecule can be a compound if it is made up of two or more different types of atoms. For example, water (H2O) is a molecule and a compound, as it is made up of two hydrogen atoms and one oxygen atom bonded together.

What are some examples of molecules and compounds?

Examples of molecules include oxygen (O2), carbon dioxide (CO2), and hydrogen gas (H2). Examples of compounds include water (H2O), table salt (NaCl), and glucose (C6H12O6).

How do molecules and compounds differ in their properties?

Molecules and compounds have different properties due to their different compositions. Molecules have physical properties, such as melting point and boiling point, while compounds have both physical and chemical properties, such as reactivity and toxicity.

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