Particles and Matter

 

Noah Nishihara Homegroup 909                                                                                  Thursday, 15 October 2015

Particles of Matter

Sub Atomic Particles

PARTICLE

SYMBOL

LOCATION

ATOMIC MASS UNIT

CHARGE

CHARGE (COULOMB)

Proton

P+

Nucleus

1

+ve

+1.602×10-19

Neutron

n0

Nucleus

1(The density is actually slightly larger than that of the proton)

No charge

 

Electron

e-

Spinning very quickly around the nucleus

-ve

eV Electron volt

-1.602×10-19

 

Structure of Atoms

Atoms are composed of a nucleus and electrons bound to the nucleus. The nucleus is a small but heavy combination of positively charged protons and neutral neutrons. The electrons are around the nucleus. The amount of positive electricity that the protons have is equal to the amount of negative electricity that the electrons possess. Atoms usually have the same number of protons and electrons so it is able to be neutral. Electrons are thought to be circling the nucleus on shells. The amount of electrons that can occupy a shell is limited. Atoms that have a shortage of electrons are positive ions and those with too much are negative ions

 

 

 

 

 

QUANTITY OF ELECTRICITY AND CURRENT

Q or q= charge (unit: Coulomb) Iori= current (unit: Ampere)       t= time (unit: seconds)

When a current of I flows for t seconds, the quantity of electricity q that is carried is expressed by this equation.

q=It

I=

(t=)

 

This diagram will help with memorising this equation.

 

 

 

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