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प्रश्न
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
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उत्तर
Mendeleev's periodic table : atomic mass : : Modern periodic table : atomic number
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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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−
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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?
What is meant by a group, in a periodic table?
What is the name of those elements which divide metals and non-metals in the periodic table?
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
The atomic particle whose number in the atoms of an element always remains the same and which forms the real basis for the modern classification of elements is:
(a) electron
(b) proton
(c) neutron
(d) meson
Which element has the electronic configuration 2, 8, 2?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
What is the number of valence electrons in the atoms of first elements in a period?
On the basis of electronic configuration, how will you identify chemically similar elements?
What is the number of elements is 1st period the modern periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
Correct the statement.
Copper and zinc are representative elements.
Name two elements in Alkaline earth metals.
Name the type of elements which have two outermost shell incomplete.
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
How many periods and groups are there in the modern 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.
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.
Hydroxide
State what is meant by the term chemical formula.
State the number of elements in Period 2 of the Periodic Table.
Find the odd one out and give its explanation.
______ forms the basis of the modern periodic table.
Identify gas A in the following experiment.
The element which has the least tendency to lose electrons is ______
The longest period of the Modern Periodic Table is period.
Which of the following statements about the Modern Periodic Table is correct:
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
An element which is an essential constituent of all organic compounds belongs to
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
What is the general name of the last elements of the Periodic Table?
Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
