11948
If the bond between sodium and chlorine in sodium chloride were covalent , the pair of shared electrons would be attracted to the chlorine because the effective nuclear charge on the outer electrons is + 7 in chlorine but is only + 1 in sodium .
 sodium, sodium
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 sodium, sodium