1. What's the difference between an ionic bond and a covalent bond?
2 An electric current is trying to move through an atom. How do protons and electrons
impact the movement of electricity?

1. A covalent bond is formed between two non-metals that have similar electronegativities. An ionic bond is formed between a metal and a non-metal.

2. The protons and electrons of an atom are attracted to each other. They both carry an electrical charge. ... The positive charge of the protons is equal to the negative charge of the electrons. Opposite charges attract each other.

Explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.