Watch the video here: Record your observations about rock sample 1.
Record your observations about rock sample 2.
Record your observations about rock sample 3.
Record your observations about rock sample 4.

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)

Is laundry detergent an acid or a base?

Give the orbital configuration of the phosphorus (p) atom.