Elucidation of the structure of the periodic table The number of electron shells an atom determines the atomic period. Each skin has a subshell, which is loaded according to the following sequence, along with increasing atomic number: 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 8s 5g 6f 7d 7P 8p
Sabtu, 22 Oktober 2011
exothermic and endothermic reaction task
EXAMPLE exothermic reaction
1.When we hold out the hand feels warm
2.when we light a bonfire will taste even though not in contact
3.burned with kerosene oil stove
4.respiration as produces heat
EXAMPLES OF REACTION endothermic
1.Other examples of endothermic reactions in everyday lifeinclude:
-2. Dissolution of sugar. If the sugar is dissolved, it can be felt there was little sense of cold when the glass is held
The hand was cold when in contact with alcohol
3.Burning kerosene oil stove
4.- Flame campfire when camping
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