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प्रश्न
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.
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उत्तर
Magnesium
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संबंधित प्रश्न
Name the element that has two shells, both of which are completely filled with electrons.
Match the atomic number 2, 4, 8, 15 and 19 with each of the following
1) A solid non metal belonging to the third period.
2) A metal of valency 1.
3) A gaseous element with valency 2.
4) An element belonging to Group 2
5) A rare gas.
How does the number of valence electrons vary on moving from left or right in the first period of the 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)
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
Is it more or less reactive than calcium?
Name the non-metals present in period 2 and metals in period 3.
Select the correct answer
Most reactive character among the elements given below is found in
Choose the most appropriate answer from the following list of oxides which fit the description.
An amphoteric oxide.
Choose the most appropriate answer from the following list of oxides which fit the description.
An amphoteric oxide: Al2O3 (shows both acidic and basic properties)
Name and state the following with reference to the elements of the first three periods of the periodic table.
Non-metallic elements present in Period 3 of Groups 15 and 16.
