Advertisements
Advertisements
प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
A non-metal in period 2 which is tetravalent.
Advertisements
उत्तर
Tetravalent non-metal is carbon [C]
APPEARS IN
संबंधित प्रश्न
The atomic masses of three elements A, B and C having similar chemical properties are 7, 23 and 39, respectively.
- Calculate the average atomic mass of elements A and C.
- Compare the average atomic mass with atomic mass of B.
- What could the elements A, B and C be?
Define the term : Valency
Classify the following elements into metals, non-metals and metalliods
As, C, Hg, Mg, S, Si
How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?
Arrange the following elements in increasing order of their atomic radii:
Li, Be, F, N
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
State whether the following statement is true or false
On moving horizontally across a period, number of valence electrons increases from one to eight.
Choose the correct answer from the choice given:
An element A belonging to Period 3 and Group II will have
Name the elements in the correct order of their increasing atomic numbers present in the first, second, and third short periods of the periodic table.
State which of the elements are –
- metallic
- non-metallic
- noble gases
in each of the periods 2 and 3.
Name or state following with reference to the element of the first three periods of the periodic table.
A non-metal in period 2 having electronic configuration 2, 6.
