3 Periodic table and energy

Practice questions on Periodic table and energy

• Explain why elements in the same group of the periodic table have similar chemical propert… (5 marks, Explain)
• Hydrogen gas can be produced by reacting methane with steam at high temperatures. The reac… (5 marks, Explain)
• Cold packs used in sports medicine contain ammonium nitrate and water in separate compartm… (5 marks, Explain)
• A student dissolves citric acid in water and measures the pH. She then dissolves the same … (5 marks, Explain)
• Baking powder contains sodium hydrogencarbonate. When baking powder is added to cake mixtu… (5 marks, Explain)
• Hand warmers contain iron powder. When the pack is opened and exposed to air, the iron rea… (5 marks, Explain)
• Fluorine, chlorine, bromine, and iodine are all non-metals found in Group 7 of the periodi… (5 marks, Explain)
• Chlorine, bromine, and iodine are all elements in Group 7 of the periodic table, known as … (5 marks, Explain)
• A student investigates three elements from the same group of the periodic table: lithium, … (5 marks, Explain)
• Dmitri Mendeleev arranged elements into a periodic table in 1869. The modern periodic tabl… (5 marks, Explain)