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Main group elements within a column tend to gain or lose the same number of electrons................A+
Main group or Alkali metals
because boron is the first and main element in that group.
In the CAS system the letters A and B were designated to main group elements (A) and transition elements (B).
The elements in the 8 main columns of the Pperiodic Table are called Groups. Groups 1 and 2 are separated from Groups 3 to 8 by a block of elements called the Transition Series and the columns in this series have no specific names.
Group-1 has largest atomic radius. It decreases across a period
main group elements
Groups 1, 2, and 13 - 18 are the main group elements, also called the representative elements.
the noble gases
The main group elements are groups 1, 2, and 13 - 18.
Main group elements within a column tend to gain or lose the same number of electrons................A+
The main group elements have fixed valencies but members of the d block have multiple valencies.
the noble gases
all elements that are not main group elements are metals, and since rhenium is not a main group element, it is a metal. Hope this helped!
Main group elements have elements from groups 1 and 2, except hydrogen and groups 13 to 18. Main group elements are elements in groups who's lightest elements are shown by helium, lithium, boron, beryllium, carbon, nitrogen, oxygen, and fluorine.
Main group or Alkali metals
the representative elements belong to the main group in the periodic table - rosellnica balasoto