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Microorganisms:Friends or Foe NCERT Class VIII chapter 2(Science)  Loading…

Biodegradation Biodegradation is the breakdown of organic matter by microorganisms, such as bacteria and fungi. The substance which can be broken down by microorganisms are biodegradable substance whereas which cannot be broken down by microorganisms are nonbiodegradable substance. In biodegradation, oxygen(a nonmetallic element) is used by microorganisms to break down organic matter. Which is not compulsory for them. If microorganisms do not use oxygen , then it is called anaerobic biodegradation.

Which element has more charge on nucleus?  Nucleus present at center of an atom. It comprises of two subatomic particles, protons(p+) and neutrons (n). Proton is positively charged whereas neutron is chargeless. Means proton decides charge on nucleus. Number of protons in nucleus of an atom= atomic number of that atom. If atomic number of an atom is greater than number of protons also will be greater. If protons are more than charge in nucleus is also more. For example- between lead(Pb) and Tin(Sn) Atomic number of lead(Pb) =82 Number of protons in nucleus of lead=82 And Atomic number of tin(Sn) =50 Number of protons in nucleus of tin=50 Hence nucleus of lead contains more protons. Also we can say lead has more charge on nucleus than tin. Hope you understand.

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                    Nutrition in Animals NCERT Class VII (Chapter-2) - Note *Nutrient- Components of food.                 - Such as Carbohydrates,                                  proteins,                                  fats,                                  vitamins,                                  minerals *Nutrition- Intake of food                  - Its utilisation by body. *Nutrition includes-          Ingestion, Digestion,             ...

Demo test (Science) - NCERT Class VIII Chap-1 Loading…