I want anyone great at chemistry i want contact with he. Plz plz

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Why is silver chloride is an ionic compound

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6