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प्रश्न
On moving down a group, the number of valence electrons ______.
विकल्प
remains the same
increases
decreases
उत्तर
On moving down a group, the number of valence electrons remains the same.
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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.
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?
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.
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 ______
Elements of group 1 and elements of group 17 both have valency 1. Explain.
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?
