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प्रश्न
Atomic number of a few elements are given below
10, 20, 7, 14
- Identify the elements
- Identify the Group number of these elements in the Periodic Table
- Identify the Periods of these elements in the Periodic Table
- What would be the electronic configuration for each of these elements?
- Determine the valency of these elements
उत्तर
- The given elements are neon, calcium, nitrogen and silicon.
- Neon - group number 18, calcium - group number 2, nitrogen - group number 15 and silicon - group number 14.
- Neon - 2nd period, calcium - 4th period, nitrogen - 2nd period and silicon - 3rd period.
- Neon - 2, 8
Calcium - 2, 8, 8, 2
nitrogen - 2, 7
silicon - 2, 8, 4 - Neon - valency is 0, calcium - valency is 2, nitrogen - valency is 3, silicon - valency is 4.
APPEARS IN
संबंधित प्रश्न
Give the trends in atomic size on moving across the period left to right.
Why is the size of neon greater than fluorine?
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
What happens to the atomic size of elements on moving from left to right in a period?
The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba. Which one of these elements will form ions most readily and why?
_______ is the distance between the nucleus of the atom and its outermost shell.
Write scientific reason.
In same period, boron and oxygen elements have different atomic size.
Write information about the given atomic numbers in the table. 10, 20, 7.
| Atomic Number | Electronic configuration | Group | Period | Element |
| 10 | ||||
| 20 | ||||
| 7 |
- Electropositive nature of the element(s) increases down the group and decreases across the period
- Electronegativity of the element decreases down the group and increases across the period
- Atomic size increases down the group and decreases across a period (left to right)
- Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.
- Name the most electropositive element among them
- Name the most electronegative element
- Name the element with smallest atomic size
- Name the element which is a metalloid
- Name the element which shows maximum valency.
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)
