The Structure of an Atom

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Presentation transcript:

The Structure of an Atom Atomic Theory The Structure of an Atom

The Parts of an Atom The Proton The Neutron The Electron The atom is made of 3 distinct particles The Proton The Neutron The Electron

The Proton p+ Location Charge Mass Symbol The Proton is found in the centre of the atom called the Nucleus Charge The Proton has a positive charge [+] Mass The Proton has a mass of 1 amu. Symbol p+

The Neutron no Location Charge Mass Symbol The Neutron is found in the centre of the atom called the Nucleus Charge The Neutron has no charge [o] Mass The Neutron has a mass of 1 amu. Symbol no

The Electron e- Location Charge Mass Symbol The Electron is found in paths moving outside the nucleus. Charge The Electron has a negative charge [-] Mass The Electron has a mass of 0 amu. (1/1850 amu) Symbol e-

The Structure of an Atom

Summary { COMPLETE THIS TABLE } PARTICLE SYMBOL LOCATION CHARGE MASS

Facts about Atoms Atoms have equal numbers of protons and electrons. No. of Protons = No. of Electrons. The number of protons is called the Atomic Numbers Elements are arranged in the periodic table in order of increasing Atomic Number. amu = atomic mass unit.

Examples Hydrogen : H : Atomic No.1 = 1p+ 1e- Helium : He : {Complete the examples} Hydrogen : H : Atomic No.1 = 1p+ 1e- Helium : He : Aluminium : Al : Chlorine : Cl :