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What do all elements in a column in the periodic table have in common?


Their atoms have the same number of valence electrons.

Their atoms have the same atomic mass.

Their atoms have the same number of protons and electrons.

Their atoms have the same number of neutrons.

Respuesta :

elskywalker
their atoms have the same number of valence electrons

Answer: Option A

Explanation:

The elements are arranged in a periodic table based on their properties. The group of similar elements share common characteristics and hence kept in the same periods.

The elements having same number of valence electrons in their outer shell. As they have same number of valence electrons they have similar properties in terms of reactivity, stability, et cetera.

Hence, the correct answers is option A

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