Question

Suppose you were constructing a time line of developments that contributed to the modern model of the atom. Place the following events in the order that they would appear on the time line. Begin with the earliest event.

A) Discovery of electrons
B) Bohr's atomic model
C) Rutherford's gold foil experiment
D) Democritus's atomic theory

Answer 1

A timeline of key developments in atomic theory would start with Democritus's atomic theory, followed by the discovery of electrons, Rutherford's gold foil experiment, and conclude with Bohr's atomic model.

Step-by-step explanation:

When constructing a timeline of developments that contributed to the modern model of the atom, the following events should be placed in chronological order:

1. Democritus's atomic theory - Democritus proposed the idea that atoms are the smallest building block of matter.
   
2. Discovery of electrons - J. J. Thomson discovered the electron and proposed the plum pudding model.
   
3. Rutherford's gold foil experiment - Ernest Rutherford's experiment led to the discovery of the atomic nucleus.
   
4. Bohr's atomic model - Niels Bohr developed his model of the atom with electrons orbiting the nucleus in fixed orbits.

The timeline would therefore begin with Democritus's atomic theory as the earliest, followed by the discovery of electrons, Rutherford's gold foil experiment, and finally Bohr's atomic model as the most recent.