Page 51 - Chemistry_Form_2
P. 51
Chemistry
for Secondary Schools
18. Predict the position of an element in the periodic table with the electronic
configuration 2: 8: 8: 1. Justify your answer. What chemical properties
would you expect this element to have?
19. Element R belongs to period 3 and Group VI in the periodic table.
FOR ONLINE READING ONLY
(a) Draw its atomic structure.
(b) Determine its atomic number.
20. The following diagrams show the structures of atoms of elements X and Y:
(a) Which of the elements is stable?
(b) Which of the two elements is chemically more reactive? Explain.
(c) Identify elements X and Y. Give the criteria you used.
21. How does the concept of periodicity in the periodic table aid modern
chemists in organising information about chemical elements?
22. What happens when alkali earth metals burn in oxygen?
23. Consider elements T and Q. Which of the two elements is more
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electronegative? Explain.
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CHEMISTRY FORM TWO NEW 2025 DUMMY.indd 44
