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प्रश्न
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
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उत्तर
Group 17 elements or halogens:
- Reactivity: Halogens are the most reactive non-metals, their reactivity decreases down the group. Fluorine is the most reactive halogen and iodine is the least reactive halogen.
- Colour: Fluorine is a pale yellow gas, chlorine is a greenish-yellow gas, bromine is a reddish-brown liquid and iodine is a violet solid.
- Physical state: Gaseous
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संबंधित प्रश्न
What is meant in the periodic table by a group?
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
Name and state the following with reference to the elements of the first three periods of the periodic table.
Noble gas having electronic configuration: 2, 8, 8.
How do alkaline earth metals occur in nature?
Name the gas used in:
Light bulbs
Name the gas used in:
Bright colour advertising light works
Give reason:
Alkali metals and halogens do not occur free in nature.
Write a short note on the following type of element –
halogens
Write a short note on the following type of element –
noble gases
Name or state following with reference to the element of the first three periods of the periodic table.
An alkaline earth metal in period 3.
