In what situation can energy be created or destroyed? 1. in a nuclear reaction

2. during photosynthesis

3. never

4. when work is done

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

What overall charge must all compounds have