The chemical symbol for sodium is
a. n.
b. s.
c. na.
d. sn. user: the most active of all the chemical elements is a halogen known as
a. iodine.
b. astatine.
c. bromine.
d. fluorine. user: dalton used the lightest element as his standard for atomic mass. what is this element?
a. carbon
b. nitrogen
c. hydrogen
d. oxygen
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