Across
- 4. It is when a chemical species or substance is transformed, changing its molecular structure.
- 5. A chemical reaction that occurs when a substance comes into contact with oxygen or any other oxidizing substance.
- 6. a chemical element and its compounds in their natural or obtained state.
- 8. is a sequence of actions which are carried out to achieve a certain end.
- 9. It is a transformation which changes the appearance, but never its chemical nature.
- 10. a result obtained from an event.
- 11. It is a change in the elements.
Down
- 1. when elements have a communication relationship between them
- 2. is a substance added to a system to cause a chemical reaction.
- 3. is a measure referring to the common notions of hot or cold.
- 5. It is a gaseous, colorless, highly reactive chemical element present in all living things and essential for respiration.
- 7. Es una descripción simbólica de una reacción química, la cual muestra las sustancias que reaccionan.