How many of the following molecules are polar? pcl5, cos, xeo3, sebr2

Its strengthits conductivity of heat and electricity its shiny colourmalleable and ductility

Answer two atoms of oxygen;

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.