Amixture of copper and tin would be called a. an alloy b. a melt c. a metal d. a volatile

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 awnser is group 12

the answer is 0.42 is that is an option. this question provides no info