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प्रश्न
Name two elements in Alkaline earth metals.
उत्तर
Calcium and magnesium.
संबंधित प्रश्न
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
Write the merits of the modern periodic table over Mendeleev’s Periodic table
Fill in the following blank with suitable word:
Group 18 elements are called ...............
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
Give the symbol and valency of the following element and radical.
Sodium
Give the chemical formula of ammonium sulphate
Which of the following elements does not lose an electron easily?
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
