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प्रश्न
The arrangement of elements in the Modern Periodic Table is based on their ______.
विकल्प
increasing atomic mass in the period
increasing atomic number in the horizontal rows
increasing atomic number in the vertical columns
increasing atomic mass in the group
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उत्तर
The arrangement of elements in the Modern Periodic Table is based on their increasing atomic number in the horizontal rows.
Explanation:
Elements in the Long Form of the Periodic Table are arranged sequentially by their increasing atomic numbers from left to right along the horizontal periods.
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संबंधित प्रश्न
What is the usual number of valence electrons in the atoms of the last element 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.
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
Answer the following question.
How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?
Give the symbol and valency of the following element and radical.
Hydrogen
Give the chemical formula of ammonium sulphate
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
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
- 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.
