1. The Periodic Table Notes:
History:
• The PTE was first developed by Russian, ________________________________
• Mendeleev made up his table by ordering the elements by increasing
___________and grouped them according to similar ______________________.
• He left gaps for as yet _____________________________elements
• He was able to predict their_______________________ as well (color, MP, density,
weight, etc)
• Successfully predicted 7 out of 10
Overview:
• Columns are known as ___________________ or _______________________
• Rows are known as ____________________________
• The elements are arranged according to increasing _________________________.
Group I – The Alkali Metals
Physical Properites:
• Good________________________________ of heat and electricity
• ________________________________
• Low ________________________________ (float on water)
• ____________________________quickly when cut
• Low ____________________________________
Chemical Reactions:
• Burn in oxygen
• Lithium burns with Oxygen to form lithium oxide (Li2O)
• Write and Balance the equation.
•
• Write the balanced equation for the reaction between Sodium and Oxygen to form
sodium oxide (Na20).
•
• Group 1 oxides dissolve in water to form alkaline solutions of the metal
hydroxide.
• Li2O(s) + H20(l) -> 2LiOH(aq)
• React vigorously with water
• Potassium reacts with water to form potassium hydroxide (KOH) and hydrogen.
• Write the balanced equation.
•
• KOH forms an alkaline (basic) solution with turns pink/purple when
Phenolphthalein is present.
• Law of constant composition – Compounds always have
the same elements joined together in the same
proportions.
• Balanced Chemical Equations
• Formulae of reactants and products
• Relative number of particles involved
• Physical state (s), (l), (g), (aq)
• Same number of each type of atom on both sides
of the equation

2. • Write the balanced equation for sodium reaction with water to form sodium
hydroxide (NaOH) and hydrogen gas.
• React vigorously with the halogens
• Sodium reacts with Chlorine to produce sodium chloride (NaCl). Write the
balanced equation.
•
• Look at the Bohr model for sodium. What about Chlorine? Why do you think
sodium reacts with chlorine so vigorously?
• More reactive as you go down the group.
• Reactive b/c of the lone e- in the outer shell