What are fossils?

A) places where plant and animals lived many years ago
B) plants and animals that no longer live on Earth
C) prints or remains of plants and animals that lived long ago
D) scientists who study about plants and animals that lived long ago

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)

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

What is the oxidation state of an individual bromine atom in nabro3?