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प्रश्न
Name two elements in Alkali metals.
उत्तर
Sodium and potassium.
संबंधित प्रश्न
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
How many rows and columns are there in the Modem Periodic Table?
Write the merits of the modern periodic table over Mendeleev’s Periodic table
State how the valency of elements varies in a group of the periodic table?
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
State the number of elements in Period 1 of the Periodic Table.
Elements in the modern periodic table are arranged in ______groups and______ periods.
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
Spot the error:
The elements of group 13 are called the carbon family.
