Why is aluminium positioned in group 3 of the periodic table?
Aluminium is positioned in group 3 of the periodic table because it has three valence electrons in its outermost shell. Group 3, also known as the boron group, consists of the elements boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). These elements have three valence electrons in their outermost shells, which gives them similar chemical properties and makes them part of the same group.
In addition to their similar valence electron configuration, the elements in group 3 also share other characteristics. For example, they all have relatively low melting and boiling points, and they tend to form compounds with oxygen to produce oxides that are amphoteric, meaning they can act as both acids and bases.
Overall, the placement of aluminium in group 3 of the periodic table reflects its electron configuration and its similarities to other elements in the same group.
The periodic table is a tabular arrangement of the chemical elements based on their atomic number, electron configurations, and chemical properties.
Group 3, also known as the boron group, consists of the elements boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). These elements have three valence electrons in their outermost shells.
Aluminium has three valence electrons in its outermost shell.
Aluminium is positioned in group 3 of the periodic table because it has three valence electrons in its outermost shell, which gives it similar chemical properties to other elements in the same group.
Elements in group 3, such as aluminium, tend to have relatively low melting and boiling points and form compounds with oxygen that are amphoteric, meaning they can act as both acids and bases.
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