If electric fields are a collection of electrons, which of the following claims must be true? A. An electric field with closer electrons will have less potential energy

B. An electric field with more electrons will have kinetic energy

C. An electric field with more spread out electrons will have more potential energy

D. An electric field with more electrons will have more potential energy

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

a) the particles of the chair are strongly held together.