The Periodic Table

Describe the way the Periodic Table
1. Periodic Table classifies elements in order of atomic (proton) number
Use the Periodic Table to predict properties of elements by means of groups and periods
1. Colomns are the groups.
2. Rows are Periods
Describe the change from metallic to non-metallic character across a period
1. The zigzag line
Describe the relationship between Group number, number of valency electrons
1. The group number is same as the number of outer-shell electrons.
Describe lithium, sodium and potassium in Group I
1. ~ metal floats, so less dense than water ~fizzing indicates a gas is given off ~the molten ball (not Li) indicates highly exothermic reaction ~lilac flame (K) indicates very exothermic reaction because the hydrogen gas is given off ignites
Predict the properties of other elements in Group I, given data, where appropriate
Describe the trends in properties of chlorine, bromine and iodine in Group VII
Predict the properties of other elements in Group VII, given data where appropriate
Describe the noble gases as being unreactive
1. They have a stable outer shell of electrons.
Describe the uses of the noble gases in providing an inert atmosphere
1. argon in lamps, helium for filling balloons
Describe the transition elements
1. collection of metals having high densities, high melting points and forming coloured compounds, and which, as elements and compounds, often act as catalysts

Resource summary

	Created by Shravani Chingre almost 6 years ago