Boron (B), Aluminum (Al), Gallium (Ga), Indium (Ga), and Thallium (Tl).
They each have three electrons in their outermost shell with the valence electron configuration ns2np1. The boron family adopts oxidation states +3 or +1.
Boron because it is a non-metal
Although boron is a metalloid and the other elements in group 3A of the Periodic Table are metals, it is placed with group 3A because it has three valence electrons at its highest-energy orbitals. It is also a good conductor of electricity.
Beryllium is the group 3A element with the highest ionization energy.
Elements of same group have the same number of valence electrons and hence have similar properties.
The elements in a group have the similar chemical properties dueto presence of same no of electrons in their outermost shell but they differ physically because physical properties are related to their atomic sizes from top to bottom in a group atomic size increases so their physical properties also differ.
Beacause of electronic configuration (M.O.T)
In group 3A elements, or elements in group 13, have only one unpaired electrons.
Thallium
No,but group 2 are alkaline earth elements
Boron has the highest ionisation potential among group IIIA elements.
Although boron is a metalloid and the other elements in group 3A of the Periodic Table are metals, it is placed with group 3A because it has three valence electrons at its highest-energy orbitals. It is also a good conductor of electricity.
Elements in the same group (column) have the same properties. All the elements in group one have similar properties. All the elements in group two have similar properties. And so on...
Elements in the same group have similar properties. The groups are made according to the properties of elements. Elements in a group have an equal number of valence electrons.
Sulphur and helium have entirely different properties. Sulphur has properties similar to group 16 elements. Helium has properties similar to group 18 elements.
main group elements
Beryllium is the group 3A element with the highest ionization energy.
Elements of same group have the same number of valence electrons and hence have similar properties.
The elements in the same groups usually do. Elements in the same group have same number of valence electrons and hence have similar chemical and physical properties.