Friday, March 1, 2013

Physics Folio

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Name : Natysha Vani Gobi Nathan

I/C Num :

Class : 5 Science

division : 2011

Teacher : Pn. Norsiah bte Lasim

Contents

Topic Page

1. Nucleus of An Atom

2. Radioactive Decay

3. The Uses Of Radioisotopes

4. Nuclear Energy

5. attention Of Radioactive

Substances

Nucleus Of An Atom

Proton Number & Nucleon Number

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? All shares of an element contain the identical fare of protons.

? The proton identification number of an atom is defined as the number of protons in its nucleus. Proton number is represented by the symbol Z.

? In a neutral atom, the proton number also represents the number of electrons in orbit.

? The protons and neutrons in the nucleus of an atom are called nucleons.

? The nucleon number of an atom is defined as the total number of protons and neutrons in its nucleus.

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Nucleon number is represented by the symbol A.

? Number of neutrons N in the nucleus :-

N = A - Z

Nuclide Notation

? The nucleus of an atom with a particular number of protons and neutrons is called a nuclide. A nuclide is reffered to by its nucleon number, for example, atomic number 3 6 and carbon 12.

? Each type of tom has a symbol. For example, H is the symbol for hydrogen atom.

? If an atom of an element X has a nucleon number A and a proton number Z, its nuclide is repersented by the following notation :

Isotopes

? Isotopes of an element are atoms which have the kindred number of...If you want to get a full essay, score it on our website: Ordercustompaper.com



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