How many electrons are in 80 35 Br -1

please help

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

All forces cause motion? true or false

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?