Advertisements
Advertisements
प्रश्न
How does the number of valency vary on moving from left to right in the third period of the periodic table?
उत्तर
The valency of the elements increases from 1 (Na) to 4 (Si) and then declines to O (Ar) as moving from left to right in the third period of the periodic table.
संबंधित प्रश्न
Correct the statement.
Valency depends upon the number of shells in an atom.
According to atomic structure, what determines which element will be the first and which will be the last in a period?
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What is its valency?
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).
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.
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?
