Question

number the elements sodium, magnesium, phosphorus, and chlorine in the predicted order ionization energies from the highest to the smallest.

sodium

magnesium

phosphorus

chlorine

done

Explanation:

Step1: Recall ionization - energy trend

Ionization energy increases across a period from left - to - right in the periodic table.

Step2: Locate elements in periodic table

Sodium (Na), magnesium (Mg), phosphorus (P), and chlorine (Cl) are in the third period. Na is the left - most, followed by Mg, then P, and Cl is the right - most.

Step3: Order by ionization energy

Based on the trend, Cl has the highest ionization energy, followed by P, then Mg, and Na has the lowest.

Answer:

1. sodium
2. magnesium
3. phosphorus
4. chlorine