Ablock of ice is sliding down a ramp of slope 45° to the horizontal. at the bottom of the ramp, the block strikes a wall with a force of 3.4n. what is the mass of the ice? assume the force of friction is not significant

"the periodic table is arranged in order of atomic number."

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