Intro to Molecules

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is a compound molecule?

Back

A compound molecule is a molecule that contains at least two different elements chemically bonded together.

Front

Is H₂O a compound molecule?

Back

Yes, H₂O (water) is a compound molecule made of hydrogen and oxygen.

Front

How many hydrogen atoms are in a water molecule (H₂O)?

Back

There are 2 hydrogen atoms in a water molecule.

Front

What is the range of atoms in a molecule?

Back

A molecule can contain from 2 to thousands of atoms.

Front

What is the basic building block of matter?

Back

Atoms are the basic building blocks of matter.

Front

Which of the following is NOT a compound: HCl, Cl₂, NaCl, CO₂?

Back

Cl₂ is not a compound; it is a diatomic molecule of chlorine.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H₂O.

Front

What are the two main types of molecules?

Back

The two main types of molecules are elements (like O₂) and compounds (like H₂O).