Which statement applies to the electron at state 2? e EXCITED
STATE 2
energy released
EXCITED
STATE 1
energy released
GROUND
STATE
(+ NUCLEUS
Quantized Energy
emitted by
Returning Electrons
O It is at a lower energy level than the ground state.
It possesses less energy than the ground state.
O It radiates energy when moved up to state 2.
O it possesses greater energy than the ground state.

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.