Advertisements
Advertisements
प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
Metalloid in Period 3.
Advertisements
उत्तर
Silicon
APPEARS IN
संबंधित प्रश्न
The elements 4Be, 12Mg and 20Ca, each having two valence electrons in their valence shells, are in periods 2, 3 and 4 respectively of the modern periodic table. Answer the following questions associated with these elements, giving reason in each case:
(a) In which group should they be?
(b) Which one of them is least reactive?
(c) Which one of them has the largest atomic size?
Rewrite the following statement after correction, if necessary:
The metallic character of elements in a period increases gradually on moving from left to right.
Where would you locate the element with electronic configuration 2, 8 in the modern periodic table?
In each of the following pair, choose the atom having the bigger size:
(a) Mg (At. No.12) or Cl (At. No.17)
Why are noble gases placed in a separate group?
State the number of elements in periods 1, Periods 2, and Period 3 of the periodic table. Name them.
How many groups and periods are there in the modern periodic table?
Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.
Name or state following with reference to the element of the first three periods of the periodic table.
A covalent compound formed between an element in period 1 and a halogen.
Match the option A and B with the statements (i) and (ii):
| A. metal | (i) The metal that forms two types of ion. |
| B. iron | (ii) An element with electronic configuration 2, 8, 8, 3. |
