Student worksheet for investigating and explaining the trends in Group 7 -Halogens.
The work sheet captures the key points on the physical and chemical properties of G 7 elements, including the displacement reactions of the halogens.
At the end of these lesson students should be able to:
a) Describe the characteristics of G7 elements
b) Describe the trends in melting, boiling points of G7
c) Describe the reactions of G7 with hydrogen and metals (observations- video)
d) Describe the trend in reactivity of G7
e) Explain the trend in reactivity of G7 in terms of how easily the atom gains an extra electron to obtain a stable electronic configuration (size of atoms- distance of the outer shell from the nucleus, shielding of the nuclear charge, nuclear attraction for the outer shell - are considered).
f) Describe and explain the Displacement reactions of the halogens
The worksheet contains different types of activities and assessment questions (recall and application questions) that will allow students to gain the knowledge and apply it to check / assess their learning.
At the end of the worksheet, there are answers to the questions – which could be used to check the answers.