If a metal changes color over time from exposure to air, what has likely occurred?

a) a chemical change

b) a reversible change

c) a change of state

d) a physical change

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Find the mass in grams of 1.37x1020 particles of h3po4