Question

chemistry i st: sci6111s1 9 chemistry i s1 (lms) 3 - d assessment: chemical bonding (lms graded) the following figure shows the bond formation of sodium chloride, which is the compound commonly known as table salt. fill in the blanks to complete the sentences. a sodium atom has choose... valence electron(s). a chlorine atom has choose... valence electron(s).

Explanation:

Step1: Recall electron - shell configuration of sodium

Sodium (Na) has atomic number 11. Its electron - shell configuration is 2, 8, 1. The outermost shell has 1 electron, so the number of valence electrons is 1.

Step2: Recall electron - shell configuration of chlorine

Chlorine (Cl) has atomic number 17. Its electron - shell configuration is 2, 8, 7. The outermost shell has 7 electrons, so the number of valence electrons is 7.

Answer:

A sodium atom has 1 valence electron(s). A chlorine atom has 7 valence electron(s).