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प्रश्न
The electronic configuration of an element T is 2, 8, 8, 1.
What is the valency of T?
उत्तर
T needs to lose one electron to complete its octet; hence, its valency is 1.
संबंधित प्रश्न
Correct the statement.
Valency depends upon the number of shells in an atom.
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.
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.
How does number of valence electrons vary on moving from left to right in the third period of a periodic table?
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.
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?
Answer the following in respect of element \[\ce{_16^32S}\].
What is its valency?
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these is an element with valency 4?
