Advertisements
Advertisements
Question
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
Advertisements
Solution
Group 17 elements or halogens:
- Reactivity: Halogens are the most reactive non-metals, their reactivity decreases down the group. Fluorine is the most reactive halogen and iodine is the least reactive halogen.
- Colour: Fluorine is a pale yellow gas, chlorine is a greenish-yellow gas, bromine is a reddish-brown liquid and iodine is a violet solid.
- Physical state: Gaseous
APPEARS IN
RELATED QUESTIONS
Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.
What are the following group known as?
Group 1
What happens to the number of valence electrons in atoms of elements as we go down a group of the periodic table?
Name and state the following with reference to the elements of the first three periods of the periodic table.
Noble gas with duplet arrangement of electrons.
Name the alkali metals, How many electron(s) they have in their outermost orbit.
Name the method by which alkali metals can be extracted.
Give reason:
Alkali and alkaline earth metal compounds usually form electrovalent compounds.
Give reason:
Inert gases do not form compounds.
Write a short note on the following type of element –
alkaline earth metals
‘The periodic table contains elements methodically grouped together’.
