The findings of henri becquerel and the curies to discredit what notion held for a very long time? that matter can never be created or destroyed. matter is made up of any smaller parts. matter is radioactive and decays over time. that matter is indivisible and indestructible.

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?