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प्रश्न
p-block is composed of groups 1 and 2.
पर्याय
Right
Wrong
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उत्तर
p-block is composed of groups 1 and 2- Wrong
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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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?
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Why do all the elements of the same group have similar properties?
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
State how the valency of elements varies in a period of the periodic table?
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
Define:
Periodic table
Name the scientist who stated the modern periodic law.
Name two elements in Alkali metals.
What do you understand by typical elements?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
Answer the following in respect of element `31/15 P`
Give its electronic configuration
How will the tendency to gain electrons change as we go from left to right across a period? Why?
Write a short note.
Structure of the modern periodic table.
The horizontal rows in a periodic table are called _____.
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.
Zinc
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the symbol and valency of the following element and radical.
Sulphite
Give the chemical formula of sodium nitrate
Give the chemical formula of carbonic acid
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
State the number of elements in Period 1 of the Periodic Table.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Find the correlation:
Group 1 and 2 : s block : : group 13 and 18 : ______
Right or wrong sentence.
The modern periodic table has 1 to 7 periods.
Distinguish between:
s-block - p-block
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element? Explain?
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
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?
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Spot the error:
The elements of group 13 are called the carbon family.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
E and B
An element with atomic number ______ will form a basic oxide.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
Match the atomic number with the following:
An element of group 2.
