ATOMS-ELEMENTS AND COMPOUNDS REVISION

ATOMS AND ELEMENTS Define Particle, Atom, Element, Compounds and Periodic table. Contents of Slide Presentation Intro Atoms & Elements Atoms – What are atoms About an atom Atoms & Shells Subatomic Particles Compounds and Chemical Elements Quick Quiz Atomic Number Atomic Number Calculations Mass Number Calculations Neutral Atom Copy right © Science-tutors Media 2008 www.sciencetutors.zoomshare.com

ATOMS ,[object Object],[object Object],www.sciencetutors.zoomshare.com

ABOUT AN ATOM (SUB ATOMIC PARTICLES) ,[object Object],PROTONS NEUTRONS ELECTRONS Think of the sun with the planets spinning around it -this is how best you can probably describe and understand what an atom is. + Charge Charge Neutral Atomic Particles NUCLEUS Copy right © Science-tutors Media 2008 _

ATOMS AND SHELLS ,[object Object],SUBATOMIC PARTICLES - PROTONS , ELECTRONS and NEUTRONS Subatomic particles in all atoms are smaller than the atom itself. Copy right © Science-tutors Media 2008

SUBATOMIC PARTICLES (MEMORY TIPS) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Orbiting or circling/moving around outside the nucleus are tiny little particles called electrons Copy right © Science-tutors Media 2008

Compounds & Chemical Elements ,[object Object],[object Object],[object Object],[object Object],[object Object],Squashed together in the middle of the atom are protons and neutrons Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah

Compounds & Chemical Elements Quick Quiz ,[object Object],A B C D Compounds are atoms of different elements. Elements are composed of only one type of atom Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah

ATOMIC NUMBER ,[object Object],[object Object],[object Object],[object Object],Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah

ATOMIC NUMBER ATOMIC NUMBER = Number of Proton Complete the table below Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah Element Atomic Number Number of Proton Oxygen 8 Chlorine 17 Sodium 11 Magnesium 12 Carbon 6

MASS NUMBER ,[object Object],[object Object],[object Object],+ X number of protons Y number of Neutrons = x + y = mass number Mass number tells how many protons and neutrons are there in an atoms. Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah

MASS NUMBER Complete the table below Element Atomic Number Number of Mass Number neutrons Oxygen 8 16 Chlorine 17 18 Sodium 11 12 Magnesium 12 24 Carbon 6 12

NEUTRAL ATOM ,[object Object],Neutral Atom is when the No. of Protons = No. of Electrons That means number of positive charges = The number of negative charges. So they cancel out and become neutral Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah

Neutral Atoms Or Charged Ions Copy right © Science-tutors Media 2008 Compilation by Ivan Ukiwah Element No. of Protons No. of Electrons Neutral Ion Atom (+ve or – ve)

ATOMS AND MOLECULES ,[object Object],[object Object],[object Object],[object Object]

REACTION OF METALS IN AIR ,[object Object],[object Object],[object Object]

METAL OXIDE ,[object Object],[object Object],[object Object],[object Object]

REACTIONS OF METALLIC ELEMENTS ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

PRACTICAL REVIEW ,[object Object]

ATOMS-ELEMENTS AND COMPOUNDS REVISION

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