Which element in period 3 has three times the electronegativity value compared to that of li in period 2

Nitrogen

Explanation:

Elements in period two includes lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.

According to periodic trends, the electro negativity values are expected to increase across the period up to fluorine. Hence, as we go right wards, we encounter elements with higher electronegative values.

While lithium has an electronegative value of 1 , the electronegative value of element nitrogen is thrrr times this which is equal to three

Chlorine(3.16)

Explanation:

The electronegativity of an element is the ability of an atom to attract a bonding pair of an atom. This measures the tendency of an atom to attract electron to itself in a chemical bond  . One of the most electronegative element is fluorine.  

Electronegativity in the periodic table increases from left to right across the period while it decreases down the group in the periodic table.

Lithium is in period 2 with electronegativity of 0.98 . The element in period 3 with electronegativity times 3 of lithium is chlorine . Chlorine has an electronegativity of  3.16.

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.