The diagram at the top shows the configuration of a neutral atom of Nitrogen with 7 protons, 7 neutrons, and 7 electrons. Under the atom are three different configurations of subatomic particles. Which configuration represents the ion and the isotope of the atom shown? * Configuration 1 = ion, Configuration 2 = isotope
Configuration 1 = isotope, Configuration 2 = ion
Configuration 1 = ion, Configuration 3 = isotope
Configuration 2 = isotope, Configuration 3 = ion

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?