A metal, M, forms an oxide near the formula M2O surrounded by which the mass percentage of the metal is 96.54%.?

the chemical symbol for the element, M, is ??
Answers:
The atomic mass of 0xygen is 16
of 100 grams, 3.46 is oxygen, 48.27 is M1, 48.27 is M2

so the ratio of the atomic weights is 48.27/3.46 = 13.95

13.95 x 16 = 223.2

Francium, Fr, at 223.0 comes close.

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