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प्रश्न
An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?
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उत्तर
It's a Metal.
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संबंधित प्रश्न
Fill in the blank:
The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.
What is meant by 'group' in the modern periodic table? How do the following change on moving from top to bottom in a group?
(i) Number of valence electrons
(ii) Number of occupied shells
(iii) Size of atoms
(iv) Metallic character of element
(v) Effective nuclear charge experienced by valence electrons
Rewrite the following statement after correction, if necessary:
The metallic character of elements in a period increases gradually on moving from left to right.
How does the atomic size vary on going down from top to bottom in a group of the periodic table? Why does it vary this way?
Explain why, the properties of elements are repeated after 2, 8, 18 and 32 elements in 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)
How does the number of:
valence electrons and
State whether the following statement is true or false
Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32.
State whether the following statement is true or false
On moving horizontally across a period, number of valence electrons increases from one to eight.
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of the element in period 3 having atomic number 17.
