Question

which scientist constructed the model of an atom in which the atom is made of a solid positively charged substance with electrons dispersed throughout it? was this model later disproven?
a) chadwick, no
b) bohr, no
c) thomson, yes
d) rutherford, yes

Explanation:

• Thomson's model: J.J. Thomson proposed the "plum - pudding" model of the atom. In this model, the atom is a solid positively charged substance (like the pudding) with electrons (like plums) dispersed throughout it.
• Disproven: Rutherford's gold - foil experiment later disproved Thomson's model. Rutherford's experiment showed that the atom has a small, dense, positively charged nucleus, which is not in line with Thomson's "plum - pudding" concept.
• Other scientists:
• Chadwick is known for discovering the neutron.
• Bohr proposed a model of the atom with quantized electron orbits.
• Rutherford proposed the nuclear model of the atom (after disproving Thomson's model).

Answer:

C. Thomson, yes