What is the element with symbol Na?

Related questions

• What periodic table elements are radioactive?
• How can the periodic table be used to predict the properties of the elements?
• How can elements have different isotopes?
• How can elements be broken down?
• How can elements properties be predicted?
• What is a chemical element?
• What element in the fourth period of the periodic table has 5 valence electrons?
• How are chemical elements diffrent from chemical compounds?
• What does organic chemistry study?
• How do elements change from left to right in the periodic tabale?