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प्रश्न
Name two elements in halogens.
उत्तर
Chlorine and bromine.
संबंधित प्रश्न
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
What is a group in the periodic table?
Name two elements in Inert gas.
Name the metals in the first twenty elements.
Name the noble gas with 3 shells.
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Bisulphite
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?
Match the atomic number with the following:
A rare gas.
