Question

Some information related to the elements of the p block in the 17th group of the periodic table are given in the table below.

Complete the table and analyze the following questions?

a. What is the family names of elements belonging to the 17 group?

b. What is their common valency?

c. Which element has the highest electro negativity ?

d. Which element has the highest ionization energy?

e. List out the name and chemical formula of the compounds formed by these elements with block elements?

Answer 1

| Elements | Symbol | State | Chemical reactivity with hydrogen | Common oxidation state | Chemical formula of hydrides |
| Fluorine | F | Gases | Vigourous reaction | -I | HF |
| Chlorine | Cl | Gases | Vigourous reaction | -I | HCl |
| Bromine | Br | Liquid | Slow reaction | -I | HBr |
| Iodine | I | Solid | Very slow reaction | - I | HI |

a. Halogen

b. 1

c. F

d. F

e.

• sodium chloride – NaCl
• potassium chloride – KCl
• magnesium chloride- MgCl2
• calcium chloride- CaCl2
• magnesium fluoride- MgF2
• calcium fluoride – Ca F2
• sodium iodide – Nal
• potassium iodide – KI
• potassium bromide – KBr
• potassium fluoride – KF