Atomic Structure and Models Quiz

The structure of an atom, comprising a nucleus (center) with protons and neutrons, surrounded by electrons.

Positively charged subatomic particle found in the atom's nucleus.

Neutral subatomic particle found in the atom's nucleus.

Negatively charged subatomic particle orbiting the nucleus.

The total number of protons in an atom's nucleus.

English chemist who proposed an early atomic theory.

Particles smaller than an atom, like protons, neutrons, and electrons.

A simplified representation of the atom's structure developed by scientists over time.

A theory stating that matter is composed of tiny, indivisible particles called atoms, which combine in whole-number ratios to form compounds. It explains the Law of Conservation of Mass, the Law of Constant Properties, the Law of Multiple Proportions and the Law of Reciprocal Proportions.

A model of the atom proposed by J.J. Thomson, depicting it as a positively charged sphere with negatively charged electrons embedded in it, like plums in a pudding.

An experiment conducted by J.J. Thomson to study the nature of cathode rays, which led to the discovery of electrons.

The experiment proved the existence of negatively charged particles (electrons) and proved that atoms are divisible, challenging Dalton's atomic theory.

Thomson's model failed to explain the atom's stability, the scattering of alpha particles, and the existence of other subatomic particles.

A model of the atom proposed by Ernest Rutherford, suggesting a dense, positively charged nucleus at the center surrounded by negatively charged electrons orbiting it.

The experiment showed that most of the alpha particles passed through the gold foil, while some were deflected, leading to the discovery of the atom's nucleus.