Which of the following statements is true? flammability is a chemical property. modern chemical symbols were created by dimitri mendeleev. compounds usually have the same properties as the elements they are made from. all of the above.

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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)

Which feature do highland climates have that lower elevation areas do not?