Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 5 - No. 3)
Which of the following statements is true about elements in the same group (vertical column) of the periodic table?
They have the same number of protons.
They have the same number of neutrons.
They have the same number of electron shells.
They have similar chemical properties.
Explanation
Elements in the same group have similar chemical properties due to having the same number of valence electrons.
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