Asample of pure sodium-24 has an initial mass of 10.0 grams.  how many grams of sodium-24 will remain at the end of  4 half-lives? a.0.315 b.0.630 c.5.00 d.6.00

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?