Which set of the following sets of data did Mendeleev use to organize his periodic table in 1869? A. Color, smell, and taste b. Reactivity, radioactivity and size C. Mass, melting point, density D. Solids, liquid, and gases

Find the mass in grams of hydrogen gas produced when 14.0 moles of hcl is added to an excess amount of magnesium.

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

The element that has the greatest electronegativity is