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प्रश्न
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
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उत्तर
- The periodic table is based on the atomic number of an element.
- Furthermore, the valence electrons determine their position in the group.
- Elements with one valence electron are classified as the first group, elements with two valence electrons as the second group, and vice versa.
- An element with 8 valence electrons belongs to the Periodic Table's last group (18th group) (excluding He).
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संबंधित प्रश्न
In the Modern Periodic Table, which are the metals among the first ten elements?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
Define:
Periodic table
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Third Period.
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
The K and L shells of the elements Na and Mg contain electrons.
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.
What is the symbol of the element Tungsten?
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.
An element has 2 electrons in its N shell.
State its position in periodic table.
