Check List To Score A

Chapter 4: Periodic Table of Elements

A. Knowledge (Definition, meaning and facts)		Check
State the basic principle of arranging the elements in the Periodic Table from its proton number. State the physical properties of Group 1. State the physical properties of Group 17. State the changes in the atomic size and electronegativity of elements across Period 3. State three special properties of transition elements?
B. Understanding / Application / Analysis
State the position of element in Periodic Table. Explain your answer. When across Period 3 from sodium to argon, the atomic size decreases. Explain why. When across Period 3 from sodium to argon, the electronegativity increases. Explain why. The reactivity of Group 1 increases when going down the group. Explain why. The reactivity of Group 17 decreases when going down the group. Explain why. Why helium gas is not reactive? X is an element from Group 1. X in burnt in oxygen and the product is dissolved in water. What is the property of the solution formed? Explain Why. Chlorine gas is dissolved in water. What can you observe if a piece of blue litmus paper is immersed into the solution formed? Explain why. W is an element from Group 1. Predict the chemical reaction of W with: water, Oxygen, State the observation and write the chemical equation involve.
C. Synthesis (Experiment)
Describe a laboratory experiment to compare the reactivity of elements in Group 1: lithium, sodium and potassium. Describe a laboratory experiment to compare the reactivity of chlorine, bromine and iodine in the reaction with iron wool. State the observation and write the chemical equations involve in reactions.