Identify the number of electrons Atomic mass: 24

Atomic number: 12

-2 charge

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?

What volume does 1.70 ×10–3 mol of chlorine gas occupy if its temperature is 20.2 °c and its pressure is 795 mm hg?

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)