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प्रश्न
Which of the following statements about the Modern periodic table is correct?
पर्याय
18 horizontal rows are known as Periods.
7 vertical columns are known as Periods.
18 vertical columns are known as groups.
7 horizontal rows are known as groups.
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उत्तर
18 vertical columns are known as groups.
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संबंधित प्रश्न
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Give two example of group 17 elements.
How were the positions of cobalt and nickel resolved in the modern 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
What is the number of valence electrons in the atoms of first elements in a period?
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
Explain why All the elements of a group have similar chemical properties.
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
Give the group number of following elements present in periodic table
Correct the statement.
Copper and zinc are representative elements.
Name two elements in Alkaline earth metals.
Name two elements in halogens.
Name two elements in each case: Lanthanides
Name two elements in each case:
Actinides
Name the type of elements which have two outermost shell incomplete.
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
Name an alkali metal in period 3 and halogen in period 2.
Give the symbol and valency of the following element and radical.
Potassium
Give the symbol and valency of the following element and radical.
Hydrogen
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Bisulphate
To the left of the zig-zag line in the periodic table are the metal elements.
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
Elements in the modern periodic table are arranged in ______groups and______ periods.
______ and ______ are called inner transition elements.
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
Which one of the following elements exhibit maximum number of valence electrons?
Which of the following elements would lose an electron easily?
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
Spot the error:
There are 5 periods and 17 groups in the modern periodic table.
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
Define periods of modern periodic table.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
