Which two pioneer species help break up rock to create a substrate rich in organic
material. Starts the process of creating
soil in a newly created environment.

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear

How many grams of phosphorus are contained in 5.09 moles of phosphorus?