How many electrons can fit in the first energy level of 1 proton 0 neutron 1 electron

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion

The biosphere of the earth is made up of what compound? organic or inorganic?