Advertisements
Advertisements
प्रश्न
The given table shows elements with the same number of electrons in its valence shell.
| Elements | A | B | C |
| m.p. | 63.0 | 180.0 | 97.0 |
Whether these elements belong to same group or period.
उत्तर
Yes, these elements belong to the same group but are not from the same period as these elements have the same number of electrons in their valence shell.
संबंधित प्रश्न
According to atomic structure, what determines which element will be the first and which will be the last in a period?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the valency of T?
Explain why the following statement is not correct:
Atoms of elements in the same group have the same number of electron(s).
Write scientific reason.
Elements belonging to the same group have the same valency.
The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba. State the common feature in the electronic configuration.
Sodium and aluminum have atomic numbers 11 and 13, respectively. They are separated by one element in the periodic table and have valencies 1 and 3 respectively. Chlorine and potassium are also separated by one element in the periodic table (their atomic numbers being 17 and 19, respectively) and yet both have valency 1. Explain.
An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
Arrange the following as per the instruction given in the bracket:
P, Si, F, Be (decreasing order of valence electrons)
An element has 2 electrons in its N shell.
What is the valency of this element?
Match the atomic number with the following:
A gaseous element with valency 2.
