Lewis dot structure for PF

•The Lewis structure, also known as the Lewis dot diagram, Lewis dot formula, Lewis dot structure, electronic dot structure, or electronic Lewis dot structure (LEDS), is a diagram that shows the relationship between molecular atoms. And individual pairs of electrons are present in the molecule.

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- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.