boron family project


Indium is used to make mirrors that are as reflective as silver mirrors but do not tarnish as quickly

Indium is used in nuclear medicine tests, as a radio tracer to follow the movement of labeled proteins and white blood cells in the body.

Indium is used to dope germanium to make transistors. It is also used to make other electrical components such as rectifiers, thermistors and photo conductors.


Thallium is poisonous and highly toxic it was used for rats poisoning

Thallium it is used for infrared detectors

Thallium used for torture because it is slow working and painfull


Atomic Number: 31

Atomic Weight: 69.723

Melting Point: 29.76°C or 85.57°F

Boiling Point: 2204°C or 3999°F

Density: 5.91 grams per cubic centimeter

Phase at Room Temperature: Solid

Color: Silver


Atomic Number: 13

Atomic Weight: 26.981

Melting Point:660.323°C or 1220.581°F

Boiling Point: 2519°C or 4566°F

Density: 2.70 grams per cubic centimeter

Phase at Room Temperature: Solid

Element Classification: Metal


the physical properties

atomic mass: 10.811

atomic radius in picometers (pm): 1.92

density: 2.34 g/cm3

melting point: 2300 c

boiling point: 2550 c

at room temperature (22 c), this element is a soli


  • are scarce in the nature
  • are soft and have low melting point
  • are chemically reactive at modern temperature
  • are metallic