Advertisements
Advertisements
प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
The non-metallic element present in period 3 other than sulphur and chlorine.
Advertisements
उत्तर
P [Phosphorus]
APPEARS IN
संबंधित प्रश्न
The elements Be, Mg and Ca each having two electrons in their outermost shells are in periods 2, 3, and 4 respectively of the modern periodic table. Answer the following questions, giving justification in each case:-
(i) Write the group to which these elements belong.
(ii) Name the least reactive element.
(iii) Name the element having largest atomic radius.
Write the number of vertical columns in the modern periodic table. What are these columns called?
How does the number of:
valence electrons and
An element X belong to 3rd periods and group II of the periodic table state:
name of the element,
On the basis of electronic configuration, how will you identify the first and the last element of a period?
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
Choose the correct answer from the choice given:
An element A belonging to Period 3 and Group II will have
Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
Moving down in the second group, number of valence electrons ______.
An element A has 2 electrons in its fourth shell. State:
its valency
