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contestada

Compared with Group 6A elements, Group 2A elements have
a. more atoms in the ground state.
b. more valence electrons.
c. more isotopes.
d. fewer valence electrons.

Respuesta :

W0lf93
The periodic table of elements is divided into eight groups, excluding the transition metals. The elements in these groups are placed in their respective positions due to the number of valence electrons they have. The valence electrons of an atom are the electrons in the outermost shell of the atom. Thus, the atoms of the elements in group 1 have 1 valence electron, those in group 2 have 2 valence electrons and so on. So an element in group 6 will have 6 valence electrons, which is more than that of an element from group 2. Therefore, the answer is D. fewer valence electrons.

Answer: Option (d) is the correct answer.

Explanation:

Valence electrons are the electrons present in the outermost shell of of an atom.

Elements of group 6A are oxygen, sulfur, selenium, tellurium, and polonium.

As all these elements are of group 6A therefore, they contain 6 valence electrons.

On the other hand, elements of group 2A are beryllium, magnesium, calcium, strontium, barium and radon.

As all these are group 2A elements therefore, they contain 2 valence electrons.

thus, we can conclude that compared with group 6A elements, group 2A elements have fewer valence electrons.