Which elements are malleable and good conductors of electricity?

a) iodine and silver
b) iodine and xenon
c) tin and silver
d) tin and xenon

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

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