Helium (he) has two valence electrons, and these electrons are located in the 1s subshell. Without using the periodic table, in which group and period is helium located?.

In apex! a liquid heated beyond a certain temperature becomes

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

Describe the basic structure of the atom