Isotopes of an element have the same number of protons but a different number of d. neutrons.

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166