Which statement about elements is false? a. the same kind of atom exist in an element b. there are about 1000 elements found in nature c. some elements have been made in laboratories d. zinc, copper, and iron are elements

For the following, determine the type of reaction and then give products.

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)

Which compound most likely has the greatest bond energy?