Multiple Choice
Which type of atom is present in both water (H2O) molecules and carbon dioxide (CO2) molecules?
2. Atoms & Elements
The Atom
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following are the basic units of matter?
A
Molecules
B
Compounds
C
Ions
D
Atoms
Verified step by step guidance1
Begin by understanding the concept of matter. Matter is anything that has mass and takes up space, and it is composed of atoms.
Recognize that atoms are the smallest units of matter that retain the properties of an element. They are the building blocks for all substances.
Differentiate between atoms and other terms: Molecules are groups of atoms bonded together, compounds are substances formed from two or more different types of atoms bonded together, and ions are atoms or molecules that have gained or lost electrons, giving them a charge.
Identify that while molecules, compounds, and ions are important in chemistry, they are composed of atoms. Therefore, atoms are the fundamental units of matter.
Conclude that atoms are the correct answer as they are the basic units from which molecules, compounds, and ions are formed.
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