What is the smallest particle of an element?

What does the cell nucleus do or, how does it function?

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 of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility