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प्रश्न
Fill in the following blank with suitable word:
A sulphide ion has negative charge because it contains less ....................... than ...................
उत्तर
A sulphide ion carries a negative charge because it contains less number of protons than electrons.
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संबंधित प्रश्न
Name the following radicals :
Cr2072
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Tick (√) the correct answer.
The sulphate radical is written as S042-. What is the formula of calcium sulphate ?
An element X has a valency of 2. Write the simplest formula for oxide of the element.
The valencies (or charges) of some of the ions are given below :
| Ion | Valency (Charge) | Ion | Valency (Charge) |
| Sodium ion | 1+ | Bromide ion | 1– |
| Ammonium ion | 1+ | Hydroxide ion | 1– |
| Calcium ion | 2+ | Sulphate ion | 2– |
| Lead ion | 2+ | Phosphate ion | 3– |
Using this information, write down the formulae of the following compounds :
(i) Sodium phosphate
(ii) Ammonium sulphate
(iii) Calcium hydroxide
(iv) Lead bromide
What do you understand by the following terms?
Acid radical
Fill in the blank:
Sodium chloride has two radicals. Sodium is a _____ radical while chloride is _____ radical.
Name the following radicals and give their valencies:
1. SO4
2. CO3
3. OH4.
4.Cr2O7
State if the following element or radical is divalent?
Nickel
Atoms that carry positive or negative charges are called ______.
