J.J. Thomson is known for his discovery of the electron in 1897. Thomson's discovery led him to create a model of an atom called the plum pudding model. The diagram shows the plum pudding model.

Question

Today, the plum pudding model is considered an inaccurate representation of an atom because an atom contains a
A.
negatively charged central core with electrons moving around the outside of the central core.

B.
positively charged central core with electrons moving around the outside of the central core.

C.
positively charged central core with neutrons moving around the outside of the central core.

D.
negatively charged central core with protons moving around the outside of the central core.

Answer 1

The correct answer is:

B. positively charged central core with electrons moving around the outside of the central core.

This reflects the modern understanding of the atom, where electrons orbit a positively charged nucleus (which contains protons and neutrons). The plum pudding model inaccurately suggested that electrons were distributed throughout a "soup" of positive charge, rather than being in distinct orbits around a central nucleus.