C1.8 - ELECTRONICSTRUCTURES

C1.8 - ELECTRONICSTRUCTURES

1. ELECTRONS IN AN ATOM ARE ARRANGED IN SHELLS/ENERGY LEVELS

2. LOWEST ENERGY LEVEL = 1ST SHELL HOLDS UP TO 2 ELECTRONS

3. 2ND ENERGY LEVEL/SHELL CAN HOLD UP TO 8 ELECTRONS

4. 4TH SHELL BEGINS TO FILL ONCE 3RD SHELL HAS 8 ELECTRONS

5. NUMBER OF ELECTRONS IN OUTERMOST SHELL OF AN ELEMENT'S ATOMS DETERMINES THE WAY IN WHICH THAT ELEMENT REACTS

6. ALL ELEMENTS IN A GROUP HAVE THE SAME NUMBER OF ELECTRONS