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प्रश्न
State the following:
The group which contains highly electropositive metals including sodium.
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उत्तर
1 [I – A] group contains highly electropositive metals.
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संबंधित प्रश्न
An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.
Define the term : Valency
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
An element Z has atomic number 16. Answer the following questions on Z:
1) State the period and group to which Z belongs
2) Is Z a metal or a non-metal?
3) State the formula between Z and hydrogen
4) What kind of a compound is this?
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
Use the letters only written in the Periodic Table given below to answer the questions that follow:
(a) State the number of valence electrons in the atom J.(b) Which element shown forms ions with a single negative charge?
(c) Which Metallic element is more reactive than R?
(d) Which element has its electrons arranged in four shells?
Arrange the following as per instruction given in the bracket.
K, Pb, Ca, Zn (increasing reactivity)
Answer the following question:
State the four blocks of the modern periodic table based on the electronic configuration of elements.
The position of certain elements in the Modern Periodic Table is shown below:
| Group → Period ↓ |
1 | 2 | 3 to 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 1 | G | H | |||||||
| 2 | A | I | B | C | |||||
| 3 | D | E | F |
Using the above table answer the following questions giving reasons in each case:
- Which element will form only covalent compounds?
- Which element is a non-metal with valency 2?
- Which element is a metal with valency 2?
- Out of H, C, and F which has the largest atomic size?
- To which family does H, C, and F belong?
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
