Rbio2 draw the lewis dot structure for rbio2. include all hydrogen atoms and nonbonding electrons. show the formal charges of all atoms. to change the symbol of an atom, double-click on the atom and enter the letter of the new atom.

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

the answer is true. hope it .