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