What happens to the mass of a sample containing a radioactive element during its half-life?
a. the mass decreases by half. b. the amount of mass is doubled. c. eventually there is no mass at all. d. the mass remains the same.

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Draw the structure for 5-isopropyl-2-methyl-3-nonene