D. have exactly the same mass. It is very difficult to separate chemically isotopes of an element from each other because A. isotopes of an element contain the same number of neutrons. B. isotopes of an element contain the same number of protons. C. isotopes of an element have the same atomic mass. D. isotopes of an element contain the same number of electrons.
Epsom salt is a hydrate of magnesium sulfate.
Select the correct formula for Epsom salt. Determine the limiting reagent and the number of moles of N 2 formed in the following balanced reaction. Indicate whether the following statements correctly describe an ionic substance, a molecular substance, or both ionic and molecular substances. The solid does not conduct electrical current. In general, the substances are hard crystalline solids with high melting points.