Unlike ionic bonds, covalent bonds involve the a. development of positively and negatively charged ions. b. gain of one or more electrons by one atom from another. c. loss of one or more electrons from one atom to another. d. sharing of electrons between atoms.

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

What must occur for air masses to form fronts

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