Neutron + Electron - Copy and label this diagram Nucleus Proton.

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Presentation transcript:

Neutron + Electron - Copy and label this diagram Nucleus Proton

ParticleCharge Relative Mass Protons+11 Neutrons01 Electrons Copy and complete this table

Periodic table

Mass number Proton number

Periodic table

Mass number Proton number

Periodic table

Mass number Proton number

How many protons, neutrons and electrons do the following atoms have… a.Beryllium b.Calcium c.Carbon d.Zinc e.Tin f.Chlorine Use your periodic table

Different elements are defined by the number of protons in the nucleus of their atoms. An isotope of an element has more (or less) neutrons in its nucleus than usual For example: Chlorine can have either 17 or 19 neutrons and so its mass number is in between them both Isotopes

Alpha radiation -  Description: 2 neutrons, 2 protons (helium nuclei) Electric Charge: 2+ Relative Atomic Mass: 4 Penetration power: Stopped by paper or a few cm of air Ionisation effect: Strongly ionising

Beta radiation -  Description: High energy electron Electric Charge: Relative Atomic Mass: 1/1860th Penetration power: Stopped by few mm of aluminium Ionisation effect: Weakly ionising

Gamma radiation -  Description: High energy electromagnetic radiation Electric Charge: 0 Relative Atomic Mass: 0 Penetration power: Reduced by several cm’s of lead or several metres of concrete Ionisation effect: Very weakly ionising z