Kailphshadle Kailphshadle

01-01-2017
Biology

contestada

What element is a gas with a mass number of 19?

Respuesta :

01-01-2017

Fluorine

Check out the periodic table. Exact mass number of Fluorine should appear as 18.99...

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Round to the required accuracy: 374.9073 to 3 s.f.