list three characteristics of chemical reactions and three characteristics of nuclear reactions.

Brief Explanations:

For chemical reactions, bonds break and form, elements retain identity, and energy changes are relatively small. For nuclear reactions, changes occur in nucleus, new elements can form, and large - energy releases are common.

Answer:

Chemical Reactions:

1. Involve bond breaking and forming.
2. Elements retain their identity.
3. Relatively small energy changes. Nuclear Reactions:
4. Changes occur in the nucleus.
5. New elements can be formed.
6. Large amounts of energy are released.