Advertisements
Advertisements
प्रश्न
Identify periods of elements and blocks of elements from given electronic configuration?
- 2, 8, 2
- 2, 8, 7
- 2, 1
उत्तर
| Electronic configuration |
Period | Block | |
| i. | 2, 8, 2 | 3 | s - Block |
| ii. | 2, 8, 7 | 3 | p - Block |
| iii. | 2, 1 | 2 | s - Block |
APPEARS IN
संबंधित प्रश्न
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
1H, 7N, 20Ca, 16S, 4Be, 18Ar Which of these elements belong to the second group?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
4Be, 6C, 8O, 5B, 13Al Which is the most electropositive element among these?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
19K, 3Li, 11Na, 4Be Which of these atoms has smallest atomic radius?
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with an explanation.
13Al, 14Si, 11Na, 12Mg, 16S
Which of the above elements has the highest metallic character?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
To which period does this element belong?
An element has its electron configuration as 2, 8, 2. Now answer the following question.
With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
Which among the following is the largest element?
Find the odd one out and give its explanation.
Find the odd one out and give its explanation.
Find the odd one out and give its explanation.
Write the name of an element having electronic configuration 2,8,2.
What determines the chemical reactivity of elements?
Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
| 2) Alkali metals | b) Group 17 |
| 3) Halogen | c) Group 2 |
| 4) Noble gas | d) Group 1 |
| e) Group 14 |
Write the name.
Highest electropositive element
The elements lithium and beryllium are in the same period because their valencies are similar.
Write an Explanation.
Group
In group 2, beryllium and calcium elements, calcium is more electropositive element than beryllium.
XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.
- Determine the position of the element X and Y periodic table.
- X and Y belongs to which of the following: metals, nonmetals or metalloids?
- From which block the elements X and Y are?
- Determine the electronic configuration and valency of these elements.
