Chemistry, CH 05 Bell work (80-85)

Chemistry, CH 05 Bell work (81-85) 81.The ____________ effect occurs when an atom’s inner electrons cancel out positive charges in the nucleus so the last energy level cannot feel their pull. 82. The reason an atom’s radius gets larger moving down a group is because each atom gains ________ _______ moving down the group. 83. The reason an atom’s radius gets smaller moving across a period is because amount of ___________ in the nucleus increases, causing a stronger pull on the last energy level. 84. Those atoms in the same group will all have the _________ same effective nuclear charge that is felt on their last energy levels. 85.The effective nuclear charge that is felt on the last energy level in an Iodine atom is: ________________.