The electronic configuration of an element is 1s2 2s2 2p6 3s2 3p1 . An atom of this element form an ion that will have charge (A) +1 (B) +2 (C) +3 (D) -1

Which part of a feedback mechanism is able to monitor the conditions outside of cells and usually uses nerve cells to relay this information to an intergrating center

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.