Question

Which of these was a characteristic of the Thomson model of the atom, but not the Dalton model?

negatively charged electrons
positive charge concentrated at the center of the atom
unequal positive and negative charges
indivisible atoms

Answer 1

negatively charged electrons

Step-by-step explanation:

According to Dalton's Model, matter is made up of tiny particles known as atoms. Electrons were not known at that time. Thomson gave the plum pudding model which describe atom to be over all neutral with equal distribution of negatively charged electrons in the region of positive charges.

Thus, negatively charged electrons were a characteristic of the Thomson's model of the atom but not the Dalton's model.

Answer 2

The correct option is the first one, which is: Negatively charged electrons.

J.J Thomson was British physicist who discovered the electron in 1897, by his experiment with "cathode ray tubes". For this work and contribution to science, he was awarded the Nobel Prize for physics in 1906.