The europeans referred to china as the far east.the chinese referred to china as the middle kingdom.what do these terms illustrate?

These terms illustrate how these two places viewed themselves. The Europeans saw China as being very far from them (and although geographically speaking the two locations are very far apart), they felt that the culture and the mentality was probably very different as well and felt that China was very far removed from Europe. The Chinese referring to their country as the Middle Kingdom most likely reflects the fact that they were very proud of their country and saw it as a very central power.

C. An atom’s smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to remove.

Explanation:

Actually Thomson's atom model is formed by positive and negative particles. The positive particles are bigger than the negative, but the atom is still in equilibrium, this is possible because they have the same ''density'' if you wanna call it like that. So, the properties of negative particles allow them to move free. On the other hand, bigger particles, don't have free moving like negative particles.

That's why electrons (negative particles) are the definition of electricity, because they can move easily, although this movement depend on the material, metal are better to move in than wood or plastic, for example.