Atomic Theory and Conservation of Mass

What is a key principle of the Atomic Theory regarding atoms of the same element?

Which statement is true according to the Law of Conservation of Mass?

What model of the atom did John Dalton propose?

What did J.J. Thomson discover about atoms through his experiments?

Which of the following correctly describes Ernest Rutherford's contribution to atomic theory?

What role do compounds have in atomic theory?

What characteristic of gravitons is true compared to atoms?

Which statement about atoms is incorrect?

Atomic Theory

All matter is made of atoms
Atoms are indivisible, meaning they can't be divided
All atoms of the same element are identical
Atoms of different elements are different from each other
Two or more elements can combine to form a compound

Law of Conservation of Mass

Matter cannot be created or destroyed, only changed
Mass, the amount of matter in an object, never changes
Weight changes due to gravity's pull on an object

John Dalton

Developed the Atomic Theory
Proposed that the atom is indivisible and a solid, positively charged sphere
Conducted experiments that determined substances are made up of proportions of atoms

J.J. Thomson

Discovered that electrons, negatively charged particles, are found within the positive solid sphere
Proposed the Plum Pudding Model, which depicts electrons scattered within a positively charged sphere
Used the Cathode Ray Tube to demonstrate the attraction of a beam of light towards a positive charge plate, implying a negative charge for the light beam, which he called corpuscles, now known as electrons

Ernest Rutherford

Demonstrated that an atom has a positively charged nucleus containing most of the atom's mass with empty negative space surrounding it

Explore the foundational concepts of atomic theory and the law of conservation of mass. Learn about the contributions of key scientists like John Dalton and J.J. Thomson. This quiz covers the basic principles that govern the structure of matter and its transformations.