Question

1. which model of the atom described it as being a ball of positive charge containing evenly distributed electrons, and is sometimes referred to as the plum pudding model?

bohr
rutherford
thomson
quantum mechanical

Explanation:

Thomson proposed the "plum - pudding" model. In this model, the atom is considered as a ball of positive charge with electrons (like plums in a pudding) evenly distributed throughout it. Rutherford's model had a nucleus with electrons orbiting around it. Bohr's model further refined the electron - orbit concept with quantized energy levels. The quantum mechanical model is more complex, using wave functions and orbitals.

Answer:

Thomson