Advertisements
Advertisements
प्रश्न
Write a short note on the following type of element –
alkali metals
Advertisements
उत्तर
Elements of I-A group like Li, Na, K, Rb, Cs, fr are called alkali metals because these metals react with water to form alkalis and hydrogen.
APPEARS IN
संबंधित प्रश्न
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 are the following group known as?
Group 17
Name and state the following with reference to the elements of the first three periods of the periodic table.
Group whose elements have zero valencies.
Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.
Name the first three alkaline earth metals.
Write the electronic configuration of the first two alkaline earth metals.
Give reason:
Inert gases do not form compounds.
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
Match the elements of List – I with their type from List – II.
| List – I | List – II |
| 1. Highly reactive, univalent metals | A: Halogens |
| 2. Highly reactive, univalent non-metals | B: Transition elements |
| 3. Unreactive, inert elements | C: Alkali metals |
| 4. Elements of group 3 to 12 [IB to VII B and VIII] | D: Lanthanide series |
| 5. Radioactive elements | E: Noble gases |
| F: Actinide series |
