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प्रश्न
Write a scientific reason.
Elements belonging to the same group have the same valency.
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उत्तर
- The valency of an element is determined by the number of valence electrons in the outermost shell of an atom of an element.
- All the elements in a group have the same number of valence electrons. Therefore, elements in the same group should have the same valency.
- For example, the elements of group I contain only one valence electron; the valency of elements of group I is one. Similarly for group II, the valency is two.
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संबंधित प्रश्न
Correct the statement.
Valency depends upon the number of shells in an atom.
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 which has a total of four shells with two 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).
How does number of valence electrons vary on moving from left to right in the third period of a periodic table?
Which one of the following elements exhibits a maximum number of valence electrons?
Arrange the following as per the instruction given in the bracket:
P, Si, F, Be (decreasing order of valence electrons)
Elements of group 1 and elements of group 17 both have valency 1. Explain.
Answer the following in respect of element \[\ce{_16^32S}\].
What is its valency?
Match the atomic number with the following:
A gaseous element with valency 2.
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?
How does the number of valency vary on moving from left to right in the third period of the periodic table?
