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प्रश्न
How many atoms are present in a PO43− ion?
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उत्तर
In a PO43− ion, five atoms are present; one of phosphorus and four of oxygen.
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संबंधित प्रश्न
Name the following radicals :
SO42
Write the names of ZnS compounds :
State whether the following statements are true or false:
A sodium ion has positive charge because it has more protons than a neutral atom.
Name the particle which has 18 electrons, 18 neutrons and 17 protons in it.
The valencies (or charges) of some of the ions are given below :
Ion Valency Ion Valency (Charge) (Charge)
Sodium ion 1+ Nitrate ion 1–
Copper ion 2+ Sulphide ion 2–
Using this information, write down the formulae of :
- Sodium sulphide
- Copper nitrate
Explain the formation of (i) sodium ion, and (ii) chloride ion, from their respective atoms giving the number of protons and number of electrons in each one of them. What is the reason for positive charge on a sodium ion and a negative charge on a chloride ion ?
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?
Basic radical
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Chromium sulphate
Choose the correct answer from the options given below.
The number of carbon atoms in a hydrogen carbonate radical is
