Question

fill in the blank question
thomsons model of the atom consisted of embedded in a ball of positive charge. later created a model of the atom with electrons spinning around a central nucleus. todays model is of a nucleus made of protons and neutrons surrounded by an electron

Explanation:

Thomson's model had electrons in a positive - charge sphere. Rutherford proposed the nuclear model with electrons around a central nucleus. The modern model has an electron cloud around the nucleus.

Answer:

1. electrons
2. Rutherford
3. cloud