Answer:
Noble gases
Explanation:
nobles gases have their outer energy level complete
Answer:
B
Explanation:
Reactants are the compounds which reaction produce the products. In general terms this can be expressed symbolically as follows:
reactants -> products
Other phenomena like heat are omitted because are not always present, that is, only compounds are included. Therefore, in this reaction the reactants are C3H8 (propane) and O2 ( oxygen) and the products are CO2 (carbon dioxide) and H2O (water)
Answer: any non-living thing
Explanation: abiotic means non-living
To know the density you also need to know the volume of the rock.