test periodic table

Test : Periodic Table

Questions

1. Define valency. [1]

2. How does valency vary in a group and period in the periodic table? [1]

3. What is the valency of noble gases? [1]

4. How do metals react in a period? [1]

5. How do metals react in a group? [1]

6. How does the reactivity of non–metals changes in a period and group? [2]

7. Give the properties of the oxides in a particular period. [2]

8. What is an amphoteric oxide? [1]

9. Define a neutral oxide. [1]

10. Why does lithium form covalent bond unlike other alkali which forms ionic

bond?

11. What is the general outer electronic configuration of f – block elements? [1]

12. Why do Na and K have similar properties? [1]

13. Arrange the following elements in the increasing order of metallic character :

Si, Be, Mg, Na, P. [1]

14. The atomic number of an element is 16. Determine its position in accordance

to its electronic configuration. [2]

15. Why are elements at the extreme left and extreme right the most reactive? [2]

16. Why does the ionization enthalpy gradually decreases in a group? [1]

17. Why does electronegativity value increases across a period and decreases

down period? [2]

18. How does electronegativity and non – metallic character related to each

other? [2]