Question 2 of 20 : Select the best answer for the question, 2. The combustion of fuel oil to heat a home is an example of a/an A. substitution reaction, B. exothermic reaction, C. metathesis reaction. D. endothermic reaction

Which substances have the lowest melting points: ionic covalent, or metallic

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need