Answer:
Hydrogen in its metallic state (usually considered a nonmetal)
Lithium.
Sodium.
Potassium.
Rubidium.
Cesium.
Francium.
Explanation:
Because there are parts of them just repeats them selfs over and over, classifying them as polymers.
Hg2O -> O2 + Hg
2Hg2O -> O2 + 2Hg
20g-> ?g + 18.6g
(1 molHg2O ) (1 mol O2) (32g O2)
20g 2Hg2O x ------------------- x ------------------- x -------------- = 0.77g O2
(834.36Hg2O) (1 mol Hg2O) (1 mol O2)
Probably the answer will be 28.60 because it's a lower number