Which Statement Is Correct According to Dalton’s Atomic Theory?


Martha Robinson

Dalton’s Atomic Theory is one of the fundamental theories in chemistry that explains the nature of atoms and their properties. The theory was proposed by John Dalton in 1808, and it laid the foundation for modern atomic theory. According to this theory, matter is composed of tiny particles called atoms, and these atoms are indivisible and indestructible.

Statement 1: All elements are composed of atoms.

This statement is correct according to Dalton’s Atomic Theory. The theory states that all matter is made up of atoms, which are the smallest particles of an element that can exist on their own. Atoms have a unique structure, which determines the properties of an element.

Statement 2: Atoms of different elements have different properties.

This statement is also correct according to Dalton’s Atomic Theory. Each element has a unique number of protons in its nucleus, which determines its atomic number. The number of electrons in an atom determines its chemical properties, such as reactivity and bonding behavior.

Statement 3: Atoms combine in whole-number ratios to form compounds. Atoms combine with each other to form compounds in fixed ratios.

For example, one molecule of water always contains two hydrogen atoms and one oxygen atom. This ratio is always maintained regardless of the source or method used to produce the compound.

The Importance Of Dalton’s Atomic Theory

Dalton’s Atomic Theory revolutionized our understanding of matter by providing a framework for understanding the composition and behavior of atoms. It paved the way for modern atomic theory, which has led to groundbreaking discoveries such as nuclear energy and quantum mechanics.

The Limitations Of Dalton’s Atomic Theory

Although Dalton’s Atomic Theory was groundbreaking at the time it was proposed, it has since been revised based on new scientific discoveries. For example, it was later discovered that atoms are not indivisible and can be broken down into subatomic particles such as protons, neutrons, and electrons.


In conclusion, Dalton’s Atomic Theory is a fundamental theory in chemistry that explains the nature of atoms and their properties. The theory is still relevant today and forms the basis for modern atomic theory. While the theory has some limitations, it remains an important milestone in our understanding of the microscopic world.