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Table of comparison of subatomic particles

ATOMS are made up of three different  kinds of subatomic particles (figure 1)

Figure 1 - position of subatomic particles in the atom 

Prezi on Atomic Structure

Movement of the subatomic particles in the atom

In this diagram, the blue is representing the nucleus (consisting of protons and neutrons) of the atom. The green are representative of the electrons which are constantly  going around the nucleus in their orbitals. 

Robert Brown, was a Scottish botanist from the 19th century. He created the concept of "Brownian Motion" 

 

"The random movement of microscopic particles suspended in a liquid or gas, caused by collisions with molecules of the surrounding medium. Also called Brownian movement." (thefreedictionary.com)

Brownian Motion 

The masses provided in the table to the left are extremely small. The amu (atomic mass unit) is a suitable unit for these masses.

 

1 amu = 1.660539 x 10  g

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Atomic Mass Unit

Nuclear Symbol

The nuclear symbol incorporates the letters A and Z. The element is represented by X

 

 

A

z

X

Element symbol

Mass Number A = Z + N

(protons + neutrons)

Atomic number= number of protons

Lithium 

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