Ionization energy of atoms decrease as we move down a column on the periodic table.
Answer: Ionization energy
<u>Explanation:
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The periodic table consists of elements arranged in rows (periods) and columns (groups). The arrangement of elements in a column are made based on the increasing order of atomic radii from top to bottom of column.
As the atomic radii increase in group from top to bottom, the number of electrons increase along the group lead to shielding effect. Since the count of valence electrons are same for all elements in a group, the effective nuclear charges also same.
But the increase in the atomic number lead to shielding and increase in electrons occupied in farther shells from nucleus. This leads to deduce ionisation energy when move down a group.
The intermolecular forces between water molecules are stronger than those between oxygen molecules. In general, the bigger the molecule, the stronger the intermolecular forces, so the higher the melting and boiling points.
