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Periodic Table

Chemistry Unit 2

QuestionAnswer
Periodic table Chart of all known elements. Organised according to the structure of the atoms in each element - increasing atomic no. and mass
Row Period
Column Group (Family) - similar characteristics
Alkali Metals Group 1, S(harp), e.g. Na Sodium, K Potassium, very reactive, soft and silvery metal
Alkaline Earth Metals Group 2, S(harp), e.g. Ca Calcium, Mg Magnesium, lustrous silvery metal
Halogens Group 7, P(rinciple), corrosive, non-metals, only 5 elements in group e.g Cl chlorine
Noble/Inert Gases Group 8 (O), P(rinciple), low chemical reactivity, colourless gases e.g. He Helium, Ar Arogon
Transitional Metals e.g. Cu Copper, middle and bottom sections of periodic table, D(iffuse) (N.B. and F(undamental)? at bottom)
Properties of metals Most of the periodic table; hard, shiny, strong, mostly solid, can be magnetic, good conductors, malleable, reactive, make a ringing sound, high density, can be easily combined to make alloys
Properties of non-metals Do not have the properties of metals; i.e. brittle, weak, poor conductors, non-magnetic, no metallic luster, mix of states (solid, liquids and gases), mostly insulators, make a dull sound, low density
Number top/top left of elemental symbol (relative) atomic mass = p + n
Number bottom/bottom left of elemental symbol Atomic number = p
Conductive ability to conduct or transmit heat, electricity or sound
Metalloids Properties in between or a mixture of metals and non-metals. No standard definition and no complete agreement on which elements are metalloids
Solids At room temperature most of the elements are solids
Physical change Change of phase - substance remains the same - e.g. water to ice
Chemical change Chemical reaction takes place and a new substance is formed e.g. water into hydrogen peroxide
Alkali Metal example Sodium Na
Alkaline Earth Metal example Calcium Ca
Halogen example Chlorine Cl
Noble Gas example Helium He
Metalloids example Boron B
Transitional Metals example Copper Cu
Created by: bananas20
 

 



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