What will happen when a star loses so much mass that its gravity becomes weaker? O A. The star will get hotter O B. The star will expand. C. The star will collapse O D. The star will die​

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?