Are there any borderline elements, that is, do any of elements appear to have properties of both groups

elements: : aluminum, carbon, iron, magnesium, silicon, sulfur, tin, zinc

Is laundry detergent an acid or a base?

How have the greenhouse gasses increased from the year 2000 to 2018

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)