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प्रश्न
Explain
K is more reactive than Li.
उत्तर
K and Li belongs to group 1 i.e., metals and we know that for metals chemical reactivity of elements increases down the group because chemical reactivity increases as electropositive or metallic character increases.
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संबंधित प्रश्न
Arrange the following as per the instruction given in the brackets :
F, Cl, Br (Increasing electronegativity)
Name the elements with highest and lowest electronegativity ?
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 are most electronegative element?
Among the elements of the second period, Li to Ne, pick out the element with the highest electro negativity
Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (decreasing electronegativity)
Rewrite the following sentence by using the correct > (greater than) or < (less than) in the blank given :
The electronegativity of iodine is ________ that of chlorine.
The element below sodium in the same group would be expected to have a ______ (lower/higher) electro-negativity than sodium and the element above chlorine would be expected to have a ______ (lower/higher) ionization potential than chlorine.
In the table below, H does not represent hydrogen. Some elements are given in their own symbol and position in the periodic table while others are shown with a letter.
| IA | IIA | IIIA | IVA | VA | VIA | VIIA | O |
| 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Li | D | O | J | Ne | |||
| A | Mg | E | Si | H | K | ||
| A | C | F | G | L |
Select from the table.
- Which is most electronegative.
- How many valence electrons are present in G.
- Write the formula of the compound between B and H.
- In the compound between F and J what type of bond will be formed.
- Draw the electron dot structure for the compound formed between C and K.
Electronegativity across the period ______.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last). Answer the following question in relation to the given group of elements:
Which element would be expected to have the highest electronegativity?
