Question

13. In the table given below 1,2,13,14,15,16,17 represent group numbers and I,II,III,IV,V,VI represent period numbers. Some elements are listed in the table. Answer the questions that follow
1 2 13 14 15 16 17 18
I Li B C S O F
II Na Mg Al R P S X P
III Y Ca As Se Br
IV Rb Sb Te Q
V Cs Bi
VI Fr

1. What is the atomic number of X and Y?
2. Is P reactive?
3. The metal present in common salt ----
4. Give the increasing order of metallic character for the elements in group 1.
5. Give the formula of the hydride formed by R?
6. Name the element S?
7. Why are group 17 elements called electronegative?
8. Arrange the elements of group 17 in the decreasing order of electronegativity.
9. Arrange the elements of Period II(exclude P) in the increasing order of metallic character.
10.Identify the metalloid(s) in the table.

Answer 1

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