A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atom s that are held together by chemical bonds.
Some studies have shown that your deep sleep should at least be 20% of your overall sleep. It means that since most adults need 8-9 hours of sleep, they will need about 1.6-1.8 hours of deep sleep to feel fully functional next day. However, the time of deep sleep is changed and that's mainly due to the change in the sleep need of different group of people. For instance: Age Group.
1 The phase usually lasts up to 10 minutes. 2  You will be in light sleep in the second stage of a non-REM sleep. 3  Your heart rate will come down and so will your body temperature. 4  You will soon enter deep sleep phase.