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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.
उत्तर
Tetravalent non-metal is carbon [C]
APPEARS IN
संबंधित प्रश्न
Use the letters only written in the Periodic Table given below to answer the questions that Follow :
1) State the number of valence electrons in atom J.
2) Which element shown forms ions with a single negative charge?
3)Which metallic element is more reactive than R?
4) Which element has its electrons arranged in four shells?
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
How does Chemical reactivity of elements change on going from left to right in a period of the periodic table?
Give example in support of your answer.
State one reason for keeping fluorine and chlorine in the same of the periodic table.
The atomic number of an element is 20. In modern periodic table, this element is placed:
(a) 2nd period
(b) 4th period
(c) 3rd period
(d) 1st period
Why are noble gases placed in a separate group?
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
The ion of which element will migrate towards the cathode during electrolysis?
How could the atomic radius of a noble gas be compared with the other elements in a period?
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
Fill in the blanks from the words A to F given below.
A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative
Down a group in the Modern Periodic Table.
No. of electron shells __________; No. of valence electrons ________; Electronegativity ________ Character of elements changes from _________ to ____________.
