The elements on the periodic table are arranged in order, by increasing atomic number.<span />
250 kJ/87.9 KJ per mole Cl2 * 71g/mole= 202 g It is D for plato users
Volume is the amount of space the matter takes up, density is mass OF the volume
The plasma membrane<span> is the boundary between the cell and its environment. It regulates what enters and exits the cell. Cells must maintain an appropriate amount of molecules to </span>function<span> inside them. They must also have a way to keep things out or to allow things to enter.</span>
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
