Which of these pairs of atoms are isotopes A: scandium-46, titanium-46
B: iron-56, sodium-24
C: chlorine-35, chlorine-37
D: sodium-24, magnesium-24

Surface currents are caused by blank space . question 14 options: surface currents are caused by? differences in water temperature high salinity differences in density wind forces

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

Correct relationship between molecular formula and empirical formula