Using the periodic table, predict which elements will have similar chemical properties or reactivity?
A. Nitrogen, sulfur, and bromine
B. Rubidium, yttrium, and zirconium
C. Magnesium, strontium, and barium
D. Cadmium, calcium, and carbon

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium