Question

(5 points)
sodium
radon
magnesium
chlorine
calcium
2 2 7 1 8

Explanation:

Step1: Recall valence electrons

Sodium (Na) has 1 valence electron. Match with the box showing 1.

Step2: Recall Radon's electrons

Radon (Rn) is a noble gas with 8 valence electrons. Match with the box showing 8.

Step3: Recall Magnesium's electrons

Magnesium (Mg) has 2 valence electrons. Match with one of the boxes showing 2.

Step4: Recall Chlorine's electrons

Chlorine (Cl) has 7 valence electrons. Match with the box showing 7.

Step5: Recall Calcium's electrons

Calcium (Ca) has 2 valence electrons. Match with the remaining box showing 2.

Answer:

• Sodium: box with 1 (valence electrons: 1)
• Radon: box with 8 (valence electrons: 8)
• Magnesium: box with 2 (valence electrons: 2)
• Chlorine: box with 7 (valence electrons: 7)
• Calcium: box with 2 (valence electrons: 2)