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प्रश्न
Which of the following statements about the Modern periodic table is correct?
विकल्प
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
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
How many rows and columns are there in the modern periodic table?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
Fill in the following blank with suitable word:
Group 18 elements are called ...............
On which side of the periodic table will you find non-metals?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
Explain why All the elements of a group have similar chemical properties.
What are the merits of the modern periodic table of elements?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
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?
Define:
Periodic table
Name two elements in Alkaline earth metals.
Name two elements in each case: Lanthanides
Name the type of elements which have two outermost shell incomplete.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
Name an alkali metal in period 3 and halogen in period 2.
Name the noble gas with 3 shells.
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Nitrate
Give the symbol and valency of the following element and radical.
Bisulphite
Give the chemical formula of sodium sulphite
State the number of elements in Period 1 of the Periodic Table.
Group 13 to 18 : p block : : _______ : d block
Write scientific reason.
Lithium and sodium are included in the same group in periodic table.
State whether true or false. If false, correct the statement.
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements.
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
Which one of the following elements exhibit maximum number of valence electrons?
Which of the following elements will form an acidic oxide?
Spot the error:
The elements of group 13 are called the carbon family.
State the group and period, of the element having three shells with three electrons in valence shell.
Give reason for the following:
Inert gases do not form ion.
