Advertisements
Advertisements
Question
Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.
Advertisements
Solution
|
Element |
At. No. |
Electronic distribution |
|
Be |
4 |
2, 2 |
|
Li |
3 |
2, 1 |
|
Na |
11 |
2, 8, 1 |
|
Ca |
20 |
2, 8, 8, 2 |
|
K |
19 |
2, 8, 8, 1 |
Same IA group (Li, Na, K) and IIA group (Be, Ca)
In the second period (Be, Li) and in the fourth period (K, Ca).
APPEARS IN
RELATED QUESTIONS
What are the following group known as?
Group 1
What are the following group known as?
Group 17
Name two elements of each group.
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 having electronic configuration: 2, 8, 8.
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 gas used in:
Bright colour advertising light works
Give reason:
Alkali metals are kept in an inert solvent.
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.
