science crosswords

2. a number placed in front of a chemical symbol or formula that shows how many atoms or molecules of the substance are involved in the reaction.
3. the ratio between the mass and the amount of substance of any sample of said compound.
4. a substance or compound added to a system to cause a chemical reaction
7. he symbolic representation of a chemical reaction in the form of symbols and chemical formulas.
9. the transfer of electrons between species in a chemical reaction, where there is a process of gaining electrons or a decrease in the oxidation state by an element.
12. the hypothetical charge of an atom if all of its bonds to other atoms were fully ionic
13. the process or effect of simplifying a single chemical entity into two or more fragments.

1. a chemical reaction in which one element is replaced by another in a compound.
5. the species formed from chemical reactions.
6. a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds.
8. a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
10. the processes by which chemicals interact to form new chemicals with different compositions.
11. the unit of meathe surement for amount of substance, a quantity proportional to the number of elementary entities of a substance.
14. the artificial execution of chemical reactions to obtain one or several products.