1. What type of oxide would E&a-aluminium form?

2. Which of these belong to the same period?

3. Which of the following property will be common in group 1 elements?

4. Which one of the following elements exhibit maximum number of valence electrons?

5. Which of the following gives the correct increasing order of the atomic radii of O, F and N?

6. Element ‘A’ has electronic configuration 2, 7; ‘B’ has electronic configuration 2, 8, 5 and ‘C’ has electronic configuration 2, 8, 7. Which two elements will exhibit similar chemical properties?

7. Which of the following elements does not lose an electron easily?

8. Which of the following are the characteristics of isotopes of an element?

9. An element-X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong?

10. Which of the following properties does not match element of the halogen family?