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प्रश्न
According to atomic structure, what determines which element will be the first and which will be the last in a period?
उत्तर
The electronic configuration of an element determines its position in Modern Periodic table.
The element with one valence electron is the first while the element with 8 valence electrons is placed in the 18th group of a period.
संबंधित प्रश्न
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What is its valency?
The electronic configuration of an element T is 2, 8, 8, 1.
How many valence electrons are there in an atom of T?
Name the element which has a total of three shells with five electrons in its valence shell?
Name the element of period 3 with valency 4.
Explain why the following statement is not correct:
Atoms of elements in the same group have the same number of electron(s).
The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba. State the common feature in the electronic configuration.
The valence shell of element A contains 3 electrons while the valence shell of element B contains 6 electrons. If A combines with B, the probable chemical formula of the compound is ______
Which one of the following elements exhibits a maximum number of valence electrons?
An element has 2 electrons in its N shell.
What is the valency of this element?
Answer the following in respect of element \[\ce{_16^32S}\].
What is its valency?
