Advertisements
Advertisements
Question
State the main helpful features of the long form of the periodic table.
Advertisements
Solution
Long-form of the periodic table has 7 periods horizontal rows and 18 groups vertical columns and properties show regular gradations in periods and also in groups, i.e.
| Electronegativity | → | Increases in a period |
| ↓ | decreases in a group | |
| Non-metallic character | → | Increases in a period |
| ↓ | decreases in a group | |
| Size of an atom | → | decreases in a period |
| ↓ | Increases in a group |
and so on.
APPEARS IN
RELATED QUESTIONS
What are the following group known as?
Group 18
Name two elements of each group.
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 and state the following with reference to the elements of the first three periods of the periodic table.
Group whose elements have zero valencies.
Name the alkali metals, How many electron(s) they have in their outermost orbit.
Name the first three alkaline earth metals.
Give reason:
Inert gases do not form compounds.
Write a short note on the following type of element –
alkaline earth metals
Name or state following with reference to the element of the first three periods of the periodic table.
An alkaline earth metal in period 3.
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
