How many grams of o2 are needed to form 52.3 grams of h2o?

As you move from right to left on the periodic table the atomic radius fill in the blank

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Which of these conditions most likely produces an unstable isotope?