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प्रश्न
Name an alkali metal in period 3 and halogen in period 2.
उत्तर १
SOL: Na and F
उत्तर २
Period III alkali metal is sodium. Fluorine is a halogen found in period II.
संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 18 elements are called ...............
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
What are the merits of the modern periodic table of elements?
Name the type of elements which have two electrons in the outermost orbit.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
Give the symbol and valency of the following element and radical.
Potassium
Give the chemical formula of sodium bicarbonate
Where would you locate the element with electronic configuration 2,8 in the Modern Periodic Table?
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
A and F
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
