Bonds between metals and nonmetals tend to be ionic, but bonds between nonmetal atoms tend to be covalent.

explain why this is true, using your understanding of electronegativity and ionization energy for these groups of elements.

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)

Label a-f based on the table using c for concentrated and d for dilute

Salt in oceans comes from and of rocks