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प्रश्न
Name two elements in Alkaline earth metals.
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उत्तर
Calcium and magnesium.
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संबंधित प्रश्न
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
Give the group number of following elements present in periodic table
Answer the following in respect of element `31/15 P`
Give its electronic configuration
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
Find the odd one out and give its explanation.
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
______ forms the basis of the modern periodic table.
An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
- Identify the element X
- Write the electronic configuration of X
- Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
- What would be the nature (acidic/ basic) of oxides formed?
- Locate the position of the element in the Modern Periodic Table.
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has variable valency and is a member of the Oxygen family (group 16).
