Using the periodic table to explore the electronegativities of elements from Period 3 and Group 17.
The electronegativities of the given elements in period 3 and group 17 are as follows:
Element Electronegativity
Chlorine 3.16
Magnesium 1.31
Sodium 0.93
The periodic table is a tabular representation of atomic elements that are grouped into Groups and Periods.
- The Groups run from top to down from group 1 - group 18 and,
- The Periods run across the group from left to right i.e Period 1 - 7
Atomic elements that fall within the same group or period share some chemical properties such as:
- electronegativity,
- density,
- melting point,
- ionic radius etc.
The electronegativity of an atomic element is the ability of a chemical element or atom to draw electrons to itself in a compound.
From the periodic table, the electronegativities of the given elements in period 3 and group 17 are as follows:
Element Electronegativity
Chlorine 3.16
Magnesium 1.31
Sodium 0.93
By comparing the electronegativities of the element, we will realize that electronegativity of an element on the periodic table increase from left to right across the period and decreases down the group due to an increase in the size of atomic elements.
In conclusion, the electronegativity of an element increases from left to right across the period and decreases down the group.
Learn more about electronegativity here:
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