Explain how elements are arranged on the periodic table. in other words, explain why they are not just listed in one long list, but are instead grouped into rows and columns. also, describe the placement of metals, metalloids, non-metals, and noble gases on the periodic table.

What neutral atom is isoelectronic to mn+4

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

Which three statements represent the benefits of performing experiments using computer simulations?