Advertisements
Advertisements
प्रश्न
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
Advertisements
उत्तर
The elements at the end of the period have 8 electrons in the valence shell.
Ne = 2, 8
Ar = 2, 8, 8
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.
Write the electronic configuration of K and Ne.
The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, which two elements will show similar properties.
An element X belong to 3rd periods and group II of the periodic table state:
name of the element,
Write two reasons responsible for late discovery of noble gases ?
F, Cl and Br are the elements each having seven valence electrons. Which of these (i) has the largest atomic radius, (ii) is most reactive? Justify your answer stating reason for each.
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
Formula of ion of A is A2+. Element A probably belongs to ______ group.
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
Write the electronic configuration of two elements A and B whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element A reacts with element B. State whether this compound is acidic, basic or neutral. Give a reason to justify your answer.
