The electronegativity decreases going down Group 2
beryllium:1.5; magnesium:1.2; calcium: 1.0; strontium:1.0; barium:0.9
Electronegativity decrease down in a group.
going down a group, electronegativity decreases going across a period, electronegativity increases
The electronegativity increase in a period from left to right; in a group decrease by descending.
First ionization energy has a trend similar to that of electronegativity.
Electronegativity DECREASES going down a group.
The trend for first ionization energy
Electronegativity is the ability for an atom to attract electrons. It is expressed in numeric values in Paulings (a unit named after a chemist). On the periodic table it increases from left to right across a period. It decreases down a group on the periodic table.
Electronegativity decreases as you go down a group in the periodic table. This is because as you move down a group, the atomic radius increases, leading to a decrease in the attraction between the nucleus and the outer electrons, resulting in lower electronegativity values.
The p-block elements show a trend in increasing atomic size and decreasing electronegativity as you move down a group. They also exhibit an increase in metallic character and reactivity towards metals, along with a decrease in ionization energy moving down the group.
The trend in electronegativity among elements in the periodic table is caused by the attraction of an atom for electrons in a chemical bond. Electronegativity increases from left to right across a period and decreases down a group due to changes in atomic size and effective nuclear charge.
Ionization energy has a trend similar to electronegativity. Both properties generally increase across a period from left to right and decrease down a group in the periodic table. This is because both involve the attraction between electrons and the nucleus of an atom.
As you move from left to right across the periodic table, electronegativity increases, and as you move down the table electronegativity decreases.