How to i find the number of electrons in and atom?

Using the periodic table, complete the table to describe each atom. type in your answers

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

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?