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प्रश्न
p-block is composed of groups 1 and 2.
विकल्प
Right
Wrong
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उत्तर
p-block is composed of groups 1 and 2- Wrong
संबंधित प्रश्न
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?
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
How many periods and groups are there in the long form of periodic table?
What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
How were the positions of isotopes of an element decided in the modern periodic table?
On which side of the periodic table will you find non-metals?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
What are the advantages of the periodic table?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Correct the statement.
Copper and zinc are representative elements.
State its position in the periodic table?
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
Name an alkali metal in period 3 and halogen in period 2.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
What is the number of elements in the 1st period?
What is the number of elements in the 3rd period, of the modern periodic table?
In the Modern Periodic Table – atoms of all elements are arranged according to their increasing order of – atomic numbers. An atom of nitrogen has seven protons and seven electrons. State what would be its atomic number.
Give the symbol and valency of the following element and radical.
Potassium
Give the symbol and valency of the following element and radical.
Sodium
State the number of elements in Period 1 of the Periodic Table.
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
Find the odd one out and give its explanation.
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
Write an explanation.
Period
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?
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
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:
A and F
- 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.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
