Groups

Alternative transcript:

POINTS DECREASE A+ the force of attraction so election is lost more easily. So get more reactive. REACTIONS 3 They react vigorously with WATER to create an alkaline solution + hydrogen. They react with OXYGEN to create an ozide. They react with one CHLORINE to form a white precipitate. Alkali metals + H₂O REACT Jal Le 2 Na + 2H₂O Sodium + Water Metal VIGOROUSLY hydroxide gaz Alkali metals + CL lithium → 2NaOH + H₂ sodium potassium Sodium + Hydrogen Hydroxide 2 Na + Cl₂ →→→→ 2NaC.LT Sodium + Chlorine Sodium chloride Alkali metals + O₂ 4 Na + O₂ → 2NaO. Sadium + Oxygen → Salium ozide reaction with oxygen burns with a strongly red-tinged flame and produces a white solid strong orange flame and produces white solid Metal chloride large pieces produce lilac flame, smaller ones make solid immediately + Hydrogen Metal oxides reaction with water Fizzes steadily, gradually disappears Fizzes rapidly, melts into a ball and disappears quickly Ignites with sparks and a lilac flame, disappears very quickly reaction with chlorine white powder is produced and settles on the sides of the container burns with a bright yellow flame, clouds of white powder are produced and settle on the sides of the container reaction is even more vigorous than with sodium GROUP 1 halogens молодень? 19 F 19 35.5 Et 85 Br 35 127 H 53 210 At 185 DECREASES REACTIVITY MELTING + BOILING INCREASES POINT The halagens are non-metals + are. poisonous. They have similar reactions because they have 7 elections in their outer shell. They are diatomic FE CUCL Br Br II consist of 2 atoms When halogen atoms gain an election during reactions, they form 4 ions called HALIDE IONS. React with metals forming ionic compounds. React with non-metals to form covalent compounds. DISPLACEMENT BEACTION Involvers a more reactive halogen displace a less reactive halogen Cl₂ + 2kBr →2KCL + Br₂ chlorine + potassium → potassium, bromine bromide chloride Cl₂ + 2K1 chlorine + potassium iocide -2KCL + 1₂ → potassium + iodine. chloride The melting + boiling point increases down the group. due to increasing intermolecular forces as atoms become larger so more energy + force is required to overcome the forces.