10 Synthesize Since the late 1970s, the use of CFCs has been reduced, with a total ban in
2010. But CFCs can stay in the atmosphere
for up to 100 years. In the space below, draw a
graph showing the concentration of CFCs in
the atmosphere over the next 100 years.

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)

What semimetal can form four single covalent bonds.

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a