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प्रश्न
How many periods and groups are there in the modern periodic table?
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उत्तर
Eighteen groups and seven periods
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संबंधित प्रश्न
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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−
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A
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−
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−
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B
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C
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(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
Write the merits of the modern periodic table over Mendeleev’s Periodic table
What is meant by a period, in a periodic table?
Give two example of group 18 elements.
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
What is a period in a periodic table?
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Name an element of group 18 which can form compounds.
Give the symbol and valency of the following element and radical.
Bicarbonate
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
