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प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
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उत्तर
The modern periodic table consists of 7 periods.
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संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
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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A
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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?
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
On which side of the periodic table will you find metals?
Explain why, the noble gases are placed in a separate group.
Which element has the electronic configuration 2, 8, 2?
What are the periods in a periodic table? Give two characteristics of each.
Name two elements in Alkali metals.
Name two elements in Alkaline earth metals.
Name two elements in each case:
Transition element
Name the type of elements which have outermost shell incomplete.
State its position in the periodic table?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
How many periods and groups are there in the modern 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 and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Magnesium
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Ammonium
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the chemical formula of sodium sulphite
Which of the following statements about the Modern periodic table is correct?
The arrangement of elements in the Modem Periodic Table is based on their ______
In the modern periodic table, elements are arranged according to their ______
An element which is an essential constituent of all organic compounds belongs to
Which one of the following elements exhibit maximum number of valence electrons?
Arrange the following elements in the increasing order of their metallic character
| Mg, | Ca, | K, | Ge, | Ga |
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
State the group and period, of the element having three shells with three electrons in valence shell.
Match the atomic number with the following:
An element of group 2.
