kathryn profile Member info Member since: Dec 04, 2017 Question asked: 2 Question answered: 2 Best answers: 0 Questions Answers Best What would you teach in your own school? 7 Answers What does “HMU” mean in texting? 3 Answers One of the best statement of purpose writing services for me is a MyAdmissionsEssay. It is considered to be the most reliable and cheapest one among all editing services if you check the reviews online. I have used it for editing my personal statement for medical school as I had many comments from my professor and did not have time to fix the paper on my own. In short, Sodium (Na) has one valence electron. How do you know it? Take a look at Mendeleev’s periodic table of elements and find Sodium (Na) in it. It’s in the first column and in the third row. And it means that Sodium has one valence electron. The number of the column is the same as the number of valence electrons in all the elements placed in that column. kathryn has no Best Answers.