Advertisements
Advertisements
प्रश्न
What is an ion ? How is an ion formed ? Explain with the help of two examples of different ions.
उत्तर
An ion is an electrically-charged atom or molecule in which the total number of electrons is not equal to the total number of protons.
An ion is formed when a neutral atom loses or gains electrons. This loss or gain of electrons imparts a charge (positive or negative) to the neutral atom making it an ion.
There are two different types of ions:
If a neutral atom loses an electron, an overall positive charge is imparted to the atom and it becomes a positively-charged ion. A positively charged ion is called a cation. In a cation, the total number of electrons is less than the total number of protons as compared to the neutral atom. For example, sodium readily loses an electron to become a positively-charged sodium ion (Na+).
If a neutral atom gains an electron, an overall negative charge is imparted to the atom and it becomes a negatively-charged ion. A negatively-charged ion is called an anion. It has more no of electrons than the number of protons compared to the neutral atom. For example, chlorine readily gains an electron to become a negatively-charged chloride ion (Cl-).
APPEARS IN
संबंधित प्रश्न
Write the symbols and valencies of the following radicals:
- Magnesium ion
- Ammonium
- Carbonate
- Nitrate
- Oxide
- Bisulphate
- Aluminium ion
Write the names of `"NH"_4"OH"` compounds :
Write the names of ZnS compounds :
Write the names of `"H"_2"S"` compounds :
Fill in the following blank with suitable word:
The particle which is formed by the loss or gain of electrons by an atom is called..............
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compound.
Stannic oxide
Differentiate between the following with suitable examples- A basic radical and an acid radical
Match the radicals in List I with their correct names from List II.
| List I | List II | |
| 1. `"NO"_3^(1-)` | A: Bisulphite | F: Sulphate |
| 2. `"HSO"_4^(1-)` | B: Phosphate | G: Nitrate |
| 3. `"SO"_4^(2-)` | C: Carbonate | H: Phosphite |
| 4. `"PO"_4^(3-)` | D: Nitrite | I: Sulpite |
| 5. `"HCO"_3^(1-)` | E: Bicarbonate | J: Bisulphate |
State if the following element or radical is divalent?
Bromide
Atoms that carry positive or negative charges are called ______.
