Advertisements
Advertisements
प्रश्न
‘The periodic table contains elements methodically grouped together’.
Advertisements
उत्तर
The periodic table contains elements methodically grouped together like [I-A] alkali group [II-A] alkali earth group, halogens [17 OR 7-B] group, normal elements. Transition elements, noble gases [O-group], etc. If we know the properties of one member of a family, we know the properties of other members of the same family will be similar.
APPEARS IN
संबंधित प्रश्न
Arrange the Elements of Group 17 and Group 1 According to the Given Conditions.
Increasing order of atomic size,
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.
How do alkaline earth metals occur in nature?
Name the gas used in:
Filling balloons
Give reason:
Alkali metals and halogens do not occur free in nature.
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 –
halogens
State the main helpful features of the long form of the periodic table.
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
