Why do some elements on the periodic table have parenthesis around their atomic weight?


looking @ periodic table chemistry , supposed right down characteristics of elements , curious why elements on there periodic table have parenthesis around names while others don't? francium, radium, , technetium.

should include percent signs around atomic weight of of elements in work?

i looking @ periodic table chemistry , supposed right down characteristics of elements , curious why elements on there periodic table have parenthesis around names while others don't? francium, radium, , technetium. should include percent...


Science & Mathematics Chemistry Next



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