Question

Similarity in chemical properties of the atoms of elements in a group of the periodic table is most closely related to ______.

Options

• atomic numbers

• atomic masses

• number of principal energy levels

• number of valence electrons

Answer 1

Similarity in chemical properties of the atoms of elements in a group of the periodic table is most closely related to atomic numbers.

Explanation:

When elements are organised according to increasing atomic number, those with atomic numbers 2, 8, 8, 18, 18, 32, and 32 will be grouped together because of their shared physical and chemical characteristics.