Chemistry Of Group 2 Elements Topic
JEE Main Shortcuts:
Atomic Radii:
- Larger the atomic number, larger the atomic radii (down a group).
- Smaller the charge of the nucleus (more electron shells), larger the atomic radii (down a group).
Ionization Energies:
- Larger the atomic number, higher the ionization energy (down a group).
- Smaller the size of the atom, higher the ionization energy (across a period).
Hydration Energies:
- Larger the charge of the ion, higher the hydration energy (down a group).
- Smaller the size of the ion, higher the hydration energy (across a period).
CBSE Board Exam Shortcuts:
Properties of Group 2 Elements:
- All are metals.
- Silvery-white color.
- Relatively soft and low melting point.
- Good conductors of heat and electricity.
- React with oxygen to form basic oxides.
- React with water to form hydroxides.
Uses of Group 2 Elements:
- Beryllium: alloys, springs, electrical contacts.
- Magnesium: alloys, aircraft, cars.
- Calcium: food, supplements, construction.
- Strontium: fireworks, pyrotechnics.
- Barium: X-ray imaging, medical applications.
